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B1 noun (plural) and verb (third-person singular) #47 よく出る 14分で読める

spies

上位47

練習する例文メモとヒント spies 30秒で

解説 spies in your Level:

At the A1 level, 'spies' is a word you might encounter in simple stories or games. It is the plural of 'spy' (a person who watches in secret) or the action word for 'he', 'she', or 'it'. For example, 'The boy spies on his sister.' This means he is watching her without her knowing. You might also know the game 'I Spy,' where you look for something and others have to guess what it is. At this level, think of 'spies' as a word for 'watching very carefully' or 'people who watch in secret.' It is a fun word to use when playing games or reading about secret agents in cartoons. Remember that if there is more than one person, we say 'spies'. If one person does the action, we say 'he spies'. It is a simple way to talk about looking at things.

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At the A2 level, you can start using 'spies' to describe more specific situations. You might read about 'spies' in simple news stories or history books. As a noun, 'spies' refers to people who work to get secrets from other countries or companies. For example, 'The spies were caught in the city.' As a verb, 'spies' describes the act of watching someone to find out their secrets. You might say, 'The cat spies on the mouse.' This level also introduces the idea of 'spying' as noticing something. For instance, 'She spies a beautiful flower in the garden.' You should be careful with the spelling: one spy, two spies. Also, remember the 's' at the end for 'he/she/it spies'. It's a useful word for describing people who are being a bit sneaky or very observant.

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At the B1 level, 'spies' becomes a more versatile word in your vocabulary. You can use it to discuss themes in movies, books, and current events. As a noun, it often refers to 'secret agents' or 'intelligence officers' involved in international relations. You might talk about 'industrial spies' who try to steal business secrets. As a verb, 'spies' is frequently followed by 'on', as in 'The government spies on its citizens.' This level requires you to understand the moral and social implications of the word. It's not just about watching; it's about privacy and trust. You can also use 'spies' in a more literary sense to mean 'to catch sight of' something difficult to see. For example, 'The sailor spies land after weeks at sea.' You should be comfortable using 'spies' in both its noun and verb forms in various contexts, from casual conversation to more formal writing.

At the B2 level, you should be able to use 'spies' with more nuance and precision. You can distinguish between different types of spies, such as 'double agents', 'sleeper spies', or 'cyber-spies'. You understand that 'spies' as a verb can be used metaphorically, especially in discussions about technology and data privacy. For instance, 'The application spies on user behavior to optimize its algorithms.' You can also use 'spies' to describe subtle observations in literature or professional reports. At this level, you should be aware of the connotations of the word—it can be quite negative or even sensationalist. You might choose to use more formal synonyms like 'surveillance' or 'intelligence gathering' in academic or professional settings. Your ability to use 'spies' correctly in complex sentences, including passive voice and relative clauses, is expected at this stage.

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At the C1 level, you have a sophisticated grasp of 'spies' and its related concepts. You can use the word to engage in deep discussions about geopolitics, ethics, and the history of espionage. You are familiar with the cultural impact of 'spies' in literature and film, and can use the term to analyze character motivations or plot structures. You understand the technical difference between 'human intelligence' (conducted by spies) and other forms of intelligence gathering. As a verb, you use 'spies' to describe intricate observations or the intrusive nature of modern surveillance systems. You are also adept at using the word in idiomatic expressions and can recognize its use in various registers, from slang to highly formal prose. Your writing and speaking show a clear understanding of the 'y' to 'ies' transformation and the correct placement of possessive apostrophes in related terms.

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At the C2 level, you use 'spies' with the ease and precision of a native speaker. You can navigate the most complex linguistic contexts involving the word, including its use in legal, political, and philosophical discourse. You are aware of the historical evolution of the term and its shifting meanings in the digital age. You can use 'spies' to construct elaborate metaphors or to provide sharp, insightful commentary on social issues like state surveillance or corporate ethics. Your command of the word includes an understanding of its rarest uses and its place within the broader field of intelligence and security studies. You can effortlessly switch between 'spies' and its numerous synonyms to achieve the exact tone and meaning required for your communication. Whether writing a formal thesis or engaging in a high-level debate, your use of 'spies' is always accurate, nuanced, and contextually appropriate.

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練習する例文メモとヒント

spies 30秒で

Spies can be a plural noun referring to secret agents who gather confidential information, or a verb meaning he/she/it observes someone or something secretly.
The word is commonly used in contexts of international politics, thriller movies, and modern discussions about digital privacy and data monitoring.
Grammatically, 'spies' follows the 'y' to 'ies' rule for both pluralizing the noun 'spy' and conjugating the verb 'to spy' for the third-person singular.
Synonyms include agents, moles, or operatives for the noun, and monitors, observes, or spots for the verb, depending on the specific nuance intended.

The word spies serves a dual purpose in the English language, functioning both as a plural noun and as the third-person singular present form of the verb 'to spy'. As a noun, it describes individuals who are professionally or secretly engaged in gathering confidential information about a person, organization, or country, typically for a rival or enemy. In the modern era, this extends beyond the stereotypical trench-coated figures of Cold War cinema to include cyber-operatives, corporate intelligence gatherers, and undercover agents. The term carries a weight of secrecy, danger, and often moral ambiguity, as the act of spying involves a breach of trust or privacy.

Noun Usage: The government captured two foreign spies attempting to infiltrate the high-security research facility last night.

As a verb, spies describes the action of observing someone or something in a hidden or surreptitious manner. It often implies a focused, intentional effort to uncover secrets or monitor behavior without the subject's knowledge. While it can be used in high-stakes political contexts, it is also frequently used in domestic or casual settings, such as when a neighbor watches another through a window or a child peeks at hidden birthday presents. The transition from the base verb 'spy' to 'spies' follows the standard English grammatical rule where a final 'y' preceded by a consonant changes to 'ie' before adding 's'.

Every morning, the elderly man spies on the construction workers through his binoculars to ensure they are following the plans.

Historically, the concept of spies has been integral to human conflict and competition. From the ancient 'Art of War' by Sun Tzu, which dedicated an entire chapter to the use of spies, to the sophisticated digital espionage of the 21st century, the role remains constant: the acquisition of knowledge that others wish to keep hidden. In literature and film, spies like James Bond or George Smiley have shaped the public's perception of the word, blending reality with high-octane fiction. However, in professional contexts, the term 'intelligence officers' or 'analysts' is often preferred to avoid the slightly pejorative or sensationalist connotations of the word 'spies'.

The history of the Cold War is essentially a history of spies operating in the shadows of Berlin.

Verb Usage (Detection): She often spies a mistake in the ledger before anyone else even notices the numbers are off.

In a broader sense, 'spies' can also mean to catch sight of or to notice something, especially something small or distant. This usage is slightly more literary or old-fashioned but remains common in certain phrases. For example, a lookout on a ship might say he 'spies land' on the horizon. This nuance emphasizes the keenness of observation rather than the illicit nature of the act. Understanding the context—whether it involves international intrigue or simply a sharp-eyed observation—is key to mastering the use of this versatile word.

From the mountain peak, the hiker spies a tiny village nestled in the valley below.

Industrial spies were caught trying to steal the recipe for the new soft drink.

Metaphorical Usage: The software spies on user habits to provide more targeted advertisements.

A group of spies collaborated to dismantle the enemy's communication network.

Using the word spies correctly requires a clear understanding of whether you are using it as a noun or a verb. As a noun, it follows the rules for pluralization. You might talk about 'a group of spies' or 'many spies'. It often appears in the subject or object position of a sentence. For instance, 'The spies met in a dimly lit cafe' (subject) or 'The police arrested the spies' (object). It is frequently modified by adjectives that describe their origin or specialty, such as 'foreign spies', 'corporate spies', or 'undercover spies'.

Noun in Action: During the revolution, many ordinary citizens became spies for the resistance movement.

When used as a verb, spies must agree with a singular third-person subject (he, she, it, or a singular noun). It is most commonly used with the preposition 'on' to indicate the target of the observation. For example, 'He spies on his rivals to gain a competitive edge.' It can also be used transitively to mean 'to see' or 'to spot', as in 'She spies a glimmer of hope in the darkness.' In this sense, it doesn't require 'on'. The verb form is dynamic and suggests an ongoing or habitual action when used in the simple present tense.

The cat spies a bird through the window and begins to chatter excitedly.

In more complex sentence structures, 'spies' can be part of a relative clause or a conditional statement. For example, 'The agency that employs the spies has denied all involvement' or 'If he spies any suspicious activity, he must report it immediately.' It is also common in literature to see it used in the passive voice, though this usually involves the past participle 'spied'. However, the plural noun 'spies' is frequently the subject of passive constructions: 'The spies were eventually traded in a prisoner exchange.'

The detective spies a clue that everyone else had overlooked at the crime scene.

Complex Noun Usage: The existence of sleeper spies within the organization caused a massive internal investigation.

In creative writing, 'spies' can be used to personify inanimate objects or abstract concepts. One might write, 'The moon spies on the sleeping city,' suggesting a watchful, silent presence. This metaphorical use adds depth and imagery to the text. Similarly, in technology, we often say a program 'spies' on a user, which personifies the code to emphasize the intrusive nature of the data collection. Whether used literally or figuratively, the word always maintains its core essence of unobserved watching.

Whenever the teacher turns her back, he spies on his neighbor's test paper.

The novel features a network of spies working across three different continents.

Professional Context: He is an expert at spotting spies who are trying to infiltrate corporate boardrooms.

She spies an opportunity to escape while the guards are distracted by the noise.

The word spies is a staple of news reporting, particularly in stories involving international relations, national security, and technology. You will often hear news anchors discuss 'alleged spies' being detained or 'spy networks' being dismantled. In the context of global politics, the word is used to describe the human element of intelligence gathering, contrasting with 'signals intelligence' or satellite surveillance. It carries a sense of drama and intrigue that makes it a favorite for headlines and breaking news bulletins.

News Headline: 'Tensions Rise as Both Nations Expel Suspected Spies Amid Escalating Cyber-Attacks.'

In the entertainment industry, 'spies' is perhaps one of the most common words in the thriller and action genres. From the iconic James Bond franchise to the gritty realism of 'The Americans' or 'Slow Horses', the concept of spies is central to modern storytelling. Characters in these shows often use the word to describe their colleagues, their enemies, or the nature of their work. You'll hear phrases like 'We have spies everywhere' or 'He's one of our best spies'. This pop-culture usage has deeply influenced how we perceive the word, often associating it with gadgets, disguises, and high-stakes missions.

In the movie, the protagonist discovers that his own parents were secret spies for a decade.

In the tech world and discussions about digital privacy, the verb 'spies' is frequently used to describe how apps, websites, or governments monitor user data. Privacy advocates might warn that 'this software spies on your location' or 'your smart TV spies on your conversations'. This usage highlights the intrusive and non-consensual nature of modern data tracking. It shifts the word from the realm of human agents to the realm of algorithms and sensors, reflecting the changing nature of surveillance in the 21st century.

The whistleblower revealed that the agency spies on millions of private text messages every day.

Tech Discussion: Many users are unaware that their fitness tracker effectively spies on their daily routines.

Finally, you will encounter 'spies' in educational settings, particularly in history classes. Teachers use the word to describe famous figures like Nathan Hale, the Culper Ring during the American Revolution, or the various double agents of World War II. In this context, the word is used to analyze the strategic importance of intelligence in historical outcomes. It helps students understand that history is not just about battles and treaties, but also about the secret information that influenced those events.

The history book details how female spies played a crucial role in the success of the underground railroad.

During the trial, the prosecutor argued that the defendants were nothing more than industrial spies.

Casual Interaction: 'Stop being such a spy!' she laughed as her brother tried to read her diary.

The documentary explores how modern spies use social media to gather intelligence.

One of the most frequent mistakes learners make with the word spies is confusing its different grammatical roles. Because it looks the same as a plural noun and a third-person singular verb, it's easy to lose track of the subject-verb agreement. For example, saying 'The spies spies on the building' is incorrect because the plural subject 'spies' requires the base verb 'spy'. The correct form would be 'The spies spy on the building' or 'The spy spies on the building'. Keeping the number of the subject in mind is crucial for using the verb form correctly.

Incorrect Agreement: *The group of spies spies on the enemy. (Correct: The group of spies spy... or The spy spies...)

Another common error involves the use of apostrophes. Learners often confuse 'spies' (plural) with 'spy's' (singular possessive) or 'spies'' (plural possessive). Remember that 'spies' without an apostrophe is either multiple people or an action. If you want to talk about something belonging to a spy, you must use the apostrophe. For instance, 'The spy's camera' refers to one camera belonging to one spy, while 'The spies' meeting' refers to a meeting involving multiple spies. Misplacing or omitting the apostrophe can significantly change the meaning of your sentence.

Incorrect: The spies secret was finally revealed. (Correct: The spy's secret... or The spies' secret...)

Learners also sometimes struggle with the preposition that follows the verb 'spies'. While 'spies on' is the standard way to describe monitoring someone, some mistakenly use 'spies at' or 'spies to'. For example, 'He spies at his neighbors' is incorrect; it should be 'He spies on his neighbors'. Additionally, when 'spies' is used to mean 'spots' or 'notices', no preposition is needed at all. Saying 'She spies on a bird in the tree' means she is monitoring it, while 'She spies a bird' simply means she saw it. Choosing the right preposition—or none at all—is vital for clarity.

Incorrect: He spies to the documents. (Correct: He spies on the documents or He spies the documents.)

Confusing Noun and Verb: *She is a spies. (Correct: She is a spy. 'Spies' is plural.)

Finally, there is a nuance in formality and connotation. Using 'spies' can sometimes sound overly dramatic or accusatory. In a professional or academic setting, using terms like 'intelligence gathering', 'surveillance', or 'monitoring' might be more appropriate. For example, saying 'The company spies on its employees' sounds very negative, whereas 'The company monitors employee activity' sounds more neutral and administrative. Being aware of the emotional weight of the word 'spies' will help you choose the right term for your specific context.

Incorrect: The researcher spies the data for the study. (Better: The researcher analyzes the data...)

Incorrect: There are many spies in the kitchen. (Context: If you mean people watching, okay; if you mean tools, use 'spyware'.)

Plural vs. Singular: *A spies was caught. (Correct: A spy was caught. 'A' requires a singular noun.)

Incorrect: He spies on his own shadow. (Correct, but usually used as a metaphor for paranoia.)

While spies is a common and effective word, there are several alternatives that can provide more precision depending on the context. If you are referring to the noun, 'agents' or 'intelligence officers' are often used in more formal or official capacities. 'Agent' is a broad term that can apply to many roles, while 'intelligence officer' specifically denotes a professional working for a government agency. In the world of espionage fiction, you might encounter 'moles' (spies who work within an organization for a long time) or 'operatives' (those who carry out specific missions).

Spies vs. Agents: 'Spies' often implies an illicit or secret nature, whereas 'agents' can be official representatives (like FBI agents).

For the verb form, 'monitors' or 'observes' are excellent neutral alternatives. 'Monitors' suggests a systematic and often technological way of watching, such as 'The system monitors network traffic.' 'Observes' is more general and can be used in scientific or casual contexts, such as 'The scientist observes the behavior of the cells.' If the watching is particularly intrusive or unwelcome, 'snoops' or 'pries' might be more descriptive. 'Snoops' often implies looking through someone's personal belongings, while 'pries' suggests asking too many personal questions.

Instead of saying he spies on his kids, you could say he 'supervises' their online activity.

In the context of catching sight of something, 'spots', 'notices', or 'discerns' are good substitutes for the verb 'spies'. 'Spots' is very common and informal, as in 'He spots a friend in the crowd.' 'Notices' is slightly more formal and suggests a mental awareness, while 'discerns' is more sophisticated and implies seeing something that is difficult to see. Using these words can help you avoid the slightly archaic or overly dramatic tone that 'spies' can sometimes carry when used to mean 'to see'.

The eagle spies its prey from a great height, much like a scout 'scans' the horizon.

Spies vs. Informants: 'Spies' are usually trained professionals, while 'informants' are often civilians who provide information to the police or authorities.

Finally, in the digital age, 'spyware' is a crucial related term. While 'spies' refers to the people or the action, 'spyware' refers to the malicious software designed to do the spying. Understanding the distinction between the human agent and the digital tool is important in modern communication. Whether you choose 'spies', 'agents', 'monitors', or 'spots', the key is to match the word to the level of formality and the specific nuance of the situation you are describing.

The journalist spies a potential scandal in the leaked documents.

A network of spies was instrumental in the success of the military operation.

Spies vs. Detectives: 'Spies' work in secret for governments/orgs; 'detectives' work for the police to solve crimes openly.

She spies a small cat hiding under the parked car.

How Formal Is It?

フォーマル

ニュートラル

カジュアル

Child friendly

スラング

豆知識

The word is related to the Latin 'specere', which means 'to look'. This is the same root that gives us words like 'spectacle', 'inspect', and 'perspective'. So, a spy is literally someone who 'looks' closely.

発音ガイド

UK /spaɪz/

US /spaɪz/

The word is a single syllable, so the stress is on the entire word.

韻が合う語

cries dies flies lies pies rise size wise

よくある間違い

Pronouncing the 's' as a soft 's' (like 'spice') instead of a voiced 'z'.
Shortening the 'i' sound so it sounds like 'spies' (rhyming with 'miss' - incorrect).
Adding an extra syllable (like 'spy-ez').
Confusing it with 'spice' in fast speech.
Mumbling the 'z' so it sounds like 'spy'.

難易度

読解 3/5

The word is common in news and fiction, making it easy to recognize.

ライティング 4/5

The 'y' to 'ies' spelling rule and the dual noun/verb role can be tricky.

スピーキング 3/5

The pronunciation is straightforward, but the 'z' sound at the end is important.

リスニング 3/5

It can sometimes be confused with 'spice' or 'spies' (possessive) in fast speech.

次に学ぶべきこと

前提知識

watch secret person look see

次に学ぶ

surveillance espionage intelligence clandestine undercover

上級

counterintelligence cryptography reconnaissance infiltrator subterfuge

知っておくべき文法

Y to IES Pluralization

One spy becomes two spies.

Third-Person Singular Verb Conjugation

I spy, you spy, but he/she/it spies.

Prepositional Verbs

The verb 'spies' often takes the preposition 'on' (spies on someone).

Possessive Apostrophes with S-ending words

The spies' (plural possessive) secrets were safe.

Transitive vs. Intransitive Use

She spies a bird (transitive) vs. She spies on the bird (intransitive with preposition).

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レベル別の例文

The boy spies on his friend.

Le garçon espionne son ami.

Third-person singular verb.

There are two spies in the movie.

Il y a deux espions dans le film.

Plural noun.

She spies a cat in the tree.

Elle aperçoit un chat dans l'arbre.

Verb meaning 'to see'.

The spies have a secret map.

Les espions ont une carte secrète.

Plural noun subject.

He spies a red car.

Il aperçoit une voiture rouge.

Simple present verb.

The spies are very quiet.

Les espions sont très silencieux.

Plural noun with 'are'.

My brother spies on me.

Mon frère m'espionne.

Verb with 'on'.

I see the spies.

Je vois les espions.

Plural noun object.

The spies work for a different country.

Les espions travaillent pour un autre pays.

Plural noun.

He spies on the birds in his garden.

Il observe les oiseaux dans son jardin.

Verb meaning 'observes'.

The police caught the spies yesterday.

La police a attrapé les espions hier.

Plural noun object.

She spies a small mistake in the book.

Elle remarque une petite erreur dans le livre.

Verb meaning 'notices'.

Many spies use computers now.

Beaucoup d'espions utilisent des ordinateurs maintenant.

Plural noun.

The cat spies a mouse near the door.

Le chat aperçoit une souris près de la porte.

Third-person singular verb.

Spies often wear disguises.

Les espions portent souvent des déguisements.

Plural noun.

He spies an opportunity to win the game.

Il voit une opportunité de gagner le jeu.

Verb meaning 'spots'.

The government denied that the men were spies.

Le gouvernement a nié que les hommes étaient des espions.

Plural noun in a subordinate clause.

She often spies on her competitors' websites.

Elle espionne souvent les sites web de ses concurrents.

Verb with 'on' for monitoring.

Industrial spies tried to steal the new design.

Des espions industriels ont essayé de voler le nouveau design.

Compound noun: industrial spies.

The sailor spies a lighthouse through the fog.

Le marin aperçoit un phare à travers le brouillard.

Verb meaning 'to catch sight of'.

A network of spies was uncovered by the agency.

Un réseau d'espions a été découvert par l'agence.

Collective noun phrase: network of spies.

He spies on his neighbors to see who they are meeting.

Il espionne ses voisins pour voir qui ils rencontrent.

Verb indicating surreptitious observation.

The novel is about two spies during the Cold War.

Le roman parle de deux espions pendant la guerre froide.

Plural noun.

She spies a chance to improve her grades.

Elle voit une chance d'améliorer ses notes.

Verb meaning 'to notice an opportunity'.

The software secretly spies on user activity.

Le logiciel espionne secrètement l'activité de l'utilisateur.

Metaphorical verb usage for technology.

Several spies were exchanged at the border bridge.

Plusieurs espions ont été échangés sur le pont frontalier.

Passive voice construction.

He spies a flaw in the opponent's legal argument.

Il remarque une faille dans l'argumentation juridique de l'adversaire.

Verb meaning 'to discern'.

The documentary explores how spies are recruited.

Le documentaire explore comment les espions sont recrutés.

Plural noun in an indirect question.

She spies on the conversation from the next room.

Elle espionne la conversation depuis la pièce d'à côté.

Verb with 'on' for eavesdropping.

Corporate spies are a major threat to tech companies.

Les espions d'entreprise sont une menace majeure pour les entreprises technologiques.

Plural noun as a subject.

The scout spies the enemy camp from the ridge.

L'éclaireur aperçoit le camp ennemi depuis la crête.

Verb meaning 'to spot from a distance'.

The agency employs hundreds of spies worldwide.

L'agence emploie des centaines d'espions dans le monde entier.

Plural noun as an object.

The geopolitical climate necessitates a vast network of spies.

Le climat géopolitique nécessite un vaste réseau d'espions.

Plural noun in a formal context.

The protagonist spies a deeper conspiracy beneath the surface.

Le protagoniste entrevoit une conspiration plus profonde sous la surface.

Verb meaning 'to perceive something complex'.

Double spies often face extreme psychological pressure.

Les doubles espions font souvent face à une pression psychologique extrême.

Compound noun: double spies.

The algorithm spies on behavioral patterns to predict trends.

L'algorithme espionne les schémas comportementaux pour prédire les tendances.

Metaphorical verb in a technical context.

He spies an inherent contradiction in the witness's testimony.

Il décèle une contradiction inhérente dans le témoignage du témoin.

Verb meaning 'to discern a subtle point'.

The capture of the spies led to a diplomatic standoff.

La capture des espions a mené à une impasse diplomatique.

Noun in a complex noun phrase.

She spies on the historical archives for hidden truths.

Elle scrute les archives historiques à la recherche de vérités cachées.

Verb used for meticulous searching.

Sleeper spies can remain undetected for decades.

Les espions dormants peuvent rester non détectés pendant des décennies.

Compound noun: sleeper spies.

The ethical ramifications of employing spies are debated by philosophers.

Les ramifications éthiques de l'emploi d'espions sont débattues par les philosophes.

Plural noun in a philosophical context.

One spies a certain irony in the fact that the privacy advocate was being watched.

On remarque une certaine ironie dans le fait que le défenseur de la vie privée était surveillé.

Generic 'one' as subject of the verb 'spies'.

The infiltration of spies into the high command compromised the entire operation.

L'infiltration d'espions dans le haut commandement a compromis toute l'opération.

Noun in a formal, high-stakes context.

The software effectively spies on the very essence of digital identity.

Le logiciel espionne efficacement l'essence même de l'identité numérique.

Metaphorical verb in a critical context.

He spies a subtle shift in the market that others have missed.

Il perçoit un changement subtil sur le marché que d'autres ont manqué.

Verb meaning 'to perceive a minute change'.

The historical narrative is often shaped by the reports of spies.

Le récit historique est souvent façonné par les rapports des espions.

Noun in a historiographical context.

She spies on the nuances of human behavior to inform her writing.

Elle observe les nuances du comportement humain pour nourrir son écriture.

Verb used for artistic observation.

The clandestine nature of spies makes their true impact hard to quantify.

La nature clandestine des espions rend leur véritable impact difficile à quantifier.

Noun in an analytical sentence.

よく使う組み合わせ

foreign spies

industrial spies

spies on

network of spies

sleeper spies

spies a chance

alleged spies

corporate spies

spies a mistake

captured spies

よく使うフレーズ

I spy with my little eye

— A phrase used to start a popular children's game of observation.

I spy with my little eye something that is blue.

spies everywhere

— A hyperbolic expression suggesting that one is being watched from all sides.

In this small town, it feels like there are spies everywhere.

spies in the camp

— Refers to enemies or traitors who are hidden within one's own group.

The leader feared there were spies in the camp who would leak the plan.

spies a target

— To catch sight of something that one is looking for or aiming at.

The archer spies a target in the distance.

spies on the neighbors

— A common phrase for someone who is overly curious about the people living nearby.

The old lady often spies on the neighbors from her balcony.

spies an opening

— To notice an opportunity or a gap that can be exploited.

The boxer spies an opening and lands a powerful punch.

spies a trend

— To notice a new pattern or direction in behavior or fashion.

The fashion designer spies a trend toward more sustainable fabrics.

spies a glimmer

— To see a very small amount of light or a small sign of hope.

He spies a glimmer of light at the end of the tunnel.

spies a flaw

— To notice a mistake or a weakness in something.

The engineer spies a flaw in the bridge's design.

spies a bargain

— To notice something that is being sold at a very low price.

She always spies a bargain at the weekend market.

よく混同される語

spies vs spy's

This is the singular possessive form (belonging to one spy), whereas 'spies' is plural or a verb.

spies vs spies'

This is the plural possessive form (belonging to multiple spies).

spies vs spice

A completely different word referring to flavorings for food, but sounds slightly similar.

慣用句と表現

"I spy"

— To catch sight of or notice something, often used in a playful or informal way.

I spy a chocolate cake on the counter!

informal

"spies in the works"

— People who are secretly working to sabotage or monitor a project from the inside.

We need to make sure there are no spies in the works before we launch.

informal

"to have spies"

— To have people who provide you with secret information about others.

The manager seems to have spies who tell him everything the staff says.

neutral

"spies like us"

— A humorous reference to being in a situation that feels like a spy movie.

Creeping around the office at night, we felt like spies like us.

informal

"the walls have ears"

— A related idiom suggesting that spies or listeners might be anywhere.

Be careful what you say; the walls have ears in this building.

neutral

"under the radar"

— Doing something secretly so that spies or authorities do not notice.

They managed to keep the project under the radar for months.

neutral

"cloak and dagger"

— Refers to activities involving mystery and spies.

The whole operation was very cloak and dagger.

neutral

"to blow one's cover"

— When a spy's true identity is accidentally or intentionally revealed.

He almost blew his cover when he used his real name.

neutral

"a fly on the wall"

— Wishing to be an unnoticed observer, much like a spy.

I'd love to be a fly on the wall during that meeting.

informal

"to keep tabs on"

— To monitor or spy on someone's activities regularly.

The boss likes to keep tabs on everyone's lunch breaks.

informal

間違えやすい

spies vs Detectives

Both watch people and gather information.

Detectives usually work for the police and solve crimes openly; spies work in secret for governments or companies.

The detectives arrived at the crime scene, while the spies remained hidden.

spies vs Inspectors

Both look closely at things.

Inspectors check if rules are being followed; spies look for secret information.

The health inspectors checked the kitchen, but the spies were looking for the secret recipe.

spies vs Informants

Both provide secret information.

Informants are usually civilians who give info to the police; spies are often trained professionals.

The police used informants to find the gang, but the government used spies to find the enemy base.

spies vs Scouts

Both look ahead to gather info.

Scouts are usually military or sports-related and look for terrain or talent; spies look for secrets.

The scouts looked for a safe path, while the spies looked for the enemy's plans.

spies vs Watchmen

Both involve watching.

Watchmen guard a place to keep it safe; spies watch to get information.

The watchmen patrolled the building, unaware that spies were watching them.

文型パターン

[Subject] spies on [Object].

The boy spies on the dog.

There are [Number] spies.

There are three spies in the room.

[Subject] spies [Noun Phrase].

The captain spies a small island.

[Subject] is/are suspected of being spies.

The tourists were suspected of being spies.

The [Adjective] spies [Verb] [Adverb].

The industrial spies operated very cautiously.

One spies [Abstract Noun] in [Context].

One spies a certain desperation in his latest speech.

[Subject] spies an opportunity to [Verb].

She spies an opportunity to ask for a raise.

The [Noun] that spies on [Object] is [Adjective].

The app that spies on your location is dangerous.

語族

名詞

動詞

形容詞

使い方

frequency

Common in news, fiction, and everyday discussions about privacy.

よくある間違い

The spies spies on the enemy. → The spies spy on the enemy.
The subject 'spies' is plural, so the verb should be 'spy'.
He is a spies. → He is a spy.
'Spies' is the plural form; use 'spy' for one person.
The spies secret was found. → The spy's secret was found.
You need an apostrophe to show possession.
She spys on her brother. → She spies on her brother.
The correct spelling is 'spies', not 'spys'.
He spies at the documents. → He spies on the documents.
The correct preposition to use with 'spies' is 'on'.

ヒント

Subject-Verb Agreement

Always check if your subject is singular or plural before using 'spies' as a verb. He spies, but they spy.

The Y to IES Rule

Remember that 'spy' ends in a consonant + y, so you must change the y to i before adding es.

Use Synonyms for Variety

Instead of always using 'spies', try 'agents' for people or 'monitors' for actions to make your writing more interesting.

Connotation Matters

Be aware that 'spies' can sound negative. Use 'observes' if you want to sound more neutral or scientific.

The Voiced Z

Make sure the end of the word sounds like a 'z', not an 's', to sound like a native speaker.

I Spy Game

Use the phrase 'I spy' to practice noticing things around you in English.

Apostrophe Awareness

Never use an apostrophe in 'spies' unless you are showing that something belongs to them.

Genre Clues

If you see 'spies' in a book title, expect a story about secrets, mystery, and danger.

Humorous Use

You can call a curious friend a 'spy' to be funny, but don't do it if they might take it seriously!

Preposition Clues

If you hear 'spies on', you know it's a verb describing an action.

暗記しよう

記憶術

Remember: 'Spies' have 'Eyes'. The 'ies' at the end looks like 'eyes' if you squint, and that's exactly what spies use to watch you!

視覚的連想

Imagine a pair of eyes peeking through a pair of binoculars that are shaped like the letters 'i', 'e', and 's'.

Word Web

Secrets Watching Agents Privacy Binoculars Hidden Information Undercover

チャレンジ

Try to write a three-sentence story using 'spies' as a noun in the first sentence and as a verb in the second sentence.

語源

The word 'spies' comes from the Old French 'espie', which means 'a scout' or 'a spy'. This, in turn, is derived from the Frankish word 'spehōn', meaning 'to watch' or 'to observe'. It is related to the German word 'spähen', which still means 'to peer' or 'to watch'.

元の意味： The original meaning was focused on the act of scouting or watching from a distance to gather information, usually in a military context.

Germanic (via Old French)

文化的な背景

Be careful using 'spies' in political contexts, as it can be a very sensitive and accusatory term.

The UK has a particularly strong tradition of spy literature (Le Carré, Fleming), often portraying spies as complex, morally gray characters.

James Bond (007) - The quintessential fictional spy. The Americans - A TV show about Soviet sleeper spies in the US. Harriet the Spy - A famous children's book about a young girl who spies on her friends.

実生活で練習する

実際の使用場面

Espionage and Politics

expel the spies
uncover a spy ring
intelligence gathering
national security threat

Technology and Privacy

spies on user data
malicious spyware
digital surveillance
privacy breach

Casual Observation

spies on the neighbors
stop spying
I spy something blue
peeking through the blinds

Literature and Film

a classic spy thriller
undercover mission
double agent
secret identity

Business and Competition

industrial espionage
corporate spies
steal trade secrets
competitive intelligence

会話のきっかけ

"Do you enjoy watching movies about spies, like James Bond or Mission Impossible?"

"Have you ever played the game 'I Spy' when you were a child?"

"Do you think it's ethical for governments to employ spies to watch other countries?"

"Are you worried that your smartphone or computer spies on your private information?"

"If you were a spy, what would be your secret code name?"

日記のテーマ

Write about a time you felt like someone was spying on you. How did it make you feel?

Imagine you are one of the world's top spies. Describe your most dangerous mission.

Discuss the pros and cons of using spies in international relations. Is it necessary for peace?

Write a short story about a cat that spies on the secret meetings of the neighborhood dogs.

How has the concept of 'spies' changed from the Cold War era to the modern digital age?

よくある質問

10 問

Not necessarily. While it often implies a breach of privacy, in the context of national security, spies are often seen as essential for a country's safety. In fiction, they are often portrayed as heroes.

'Spy' is the singular noun (one person) or the base verb. 'Spies' is the plural noun (two or more people) or the verb form for he/she/it.

No, that is grammatically incorrect. You should say 'The spies spy on us' (plural subject) or 'The spy spies on us' (singular subject).

'Spying' is the gerund or present participle (the act of doing it), while 'spies' is the simple present verb form.

It is spelled S-P-I-E-S. You change the 'y' to an 'i' and add 'es'.

It means 'I see' or 'I notice'. It's a way to challenge others to find what you are looking at.

Yes, it is very common to say that an app or software 'spies' on its users by collecting their data without permission.

These are people who try to steal secret information from one company to give it to a competitor.

It is a neutral word, but in very formal or official reports, terms like 'intelligence officers' or 'operatives' are often preferred.

Only when it means 'to monitor'. If it means 'to see' or 'to spot', it does not need 'on'. For example: 'He spies a bird.'

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