Explanation at your level:
When something is not good, we call it bad. If you eat a bad apple, it tastes awful. If you have a bad day, you feel sad. It is the opposite of 'good.' You can use it to talk about food, movies, or even how you feel. It is a very important word for you to know!
At this level, you can use bad to describe things more specifically. We say 'The weather is bad' or 'He is a bad driver.' It helps you express that something is not right or not working well. Remember that we use 'very' to make it stronger: 'That is very bad.'
As you move to intermediate English, you will notice bad is used in many collocations. We talk about bad habits, bad news, and bad behavior. It is useful for describing situations that are not ideal or are causing problems. Try using synonyms like poor or unpleasant to vary your vocabulary.
At the B2 level, you should understand the nuance of bad in professional and social contexts. It can describe a bad reputation or a bad decision. You should also start using idioms like 'bad blood' or 'bad-mouth.' It is important to distinguish between 'bad' as a general descriptor and more specific adjectives like detrimental or substandard.
In advanced English, bad can be used in more abstract or figurative ways. You might discuss the bad effects of a policy or the bad faith of a negotiator. It becomes a tool for critical thinking. While it remains a simple word, its placement in a sentence can carry significant weight. Use it to contrast with more positive or neutral states in formal essays.
Mastery of bad involves understanding its role in idiomatic and literary contexts. It can be used ironically or for emphasis in complex narratives. You might explore how the word has shifted in meaning over centuries, from a descriptor of moral failing to a general term for low quality. At this level, you should be able to replace 'bad' with highly specific vocabulary like execrable, reprehensible, or iniquitous depending on the tone of your writing.
30秒でわかる単語
- Bad is the opposite of good.
- It is an adjective used for quality or morality.
- The comparative is worse and the superlative is worst.
- It is a very common word in daily English.
Hey there! Think of bad as the ultimate antonym to 'good.' It is a versatile adjective used to describe anything that falls below a standard of quality, safety, or morality.
You might use it to describe a bad apple (low quality), a bad grade (unpleasant outcome), or even a bad situation (harmful or serious). Because it is so broad, it is one of the first words we learn in English, but it remains useful even for advanced speakers!
The history of bad is actually a bit of a mystery! It appeared in Middle English around the 13th century as badde. Unlike many English words that come from Latin or Greek, bad has no clear ancestors in Old English or Germanic languages.
Some linguists think it might have evolved from a word meaning 'weak' or 'effeminate,' but that is debated. It is a classic example of how language changes over time, eventually replacing older words like evil or wicked in everyday conversation.
You will hear bad everywhere because it is so flexible. In casual speech, people say 'I had a bad day' or 'That movie was bad.' In more formal settings, you might describe a 'bad investment' or 'bad weather.'
Be careful: while it is common, sometimes it is better to use more descriptive words like terrible, unpleasant, or inadequate to sound more precise in professional writing.
English is full of idioms using this word!
- Bad blood: Refers to a long-standing grudge or hostility between people.
- A bad egg: Someone who is dishonest or unreliable.
- Bad-mouth: To speak negatively about someone behind their back.
- Go from bad to worse: When a situation becomes increasingly difficult.
- Bad break: An instance of bad luck.
Grammatically, bad is a simple adjective. Its comparative form is worse and its superlative is worst. Remember, never say 'badder'—that is a common mistake!
Pronunciation is straightforward: it rhymes with sad, mad, and lad. In both US and UK English, the 'a' sound is a short, open vowel. Stress is always on the single syllable.
Fun Fact
It has no clear etymological roots in Old English.
Pronunciation Guide
Short 'a' sound like in 'cat'.
Short 'a' sound, slightly nasal.
Common Errors
- Pronouncing it like 'bed'
- Making the 'a' too long
- Adding an extra syllable
Rhymes With
Difficulty Rating
Very easy to read.
Very easy to write.
Very easy to speak.
Very easy to listen.
What to Learn Next
Prerequisites
Learn Next
上級
Grammar to Know
Adjective placement
The bad dog.
Irregular comparatives
Bad - worse - worst.
Linking verbs
I feel bad.
Examples by Level
This apple is bad.
This (apple) is not good.
Simple Subject-Verb-Adjective structure.
I feel bad.
I feel not well.
Linking verb 'feel'.
The weather is bad.
The weather is not nice.
Subject + is + adjective.
He is a bad boy.
He is not a good boy.
Adjective before noun.
This is a bad movie.
This movie is not fun.
Determiner + adjective + noun.
My grade is bad.
My score is low.
Possessive pronoun.
It is a bad idea.
It is not a smart plan.
Common collocation.
Don't be bad.
Behave well.
Imperative form.
The traffic is very bad today.
I have a bad headache.
Smoking is bad for your health.
He gave a bad performance.
The hotel room was bad.
She had a bad experience.
It was a bad decision.
The milk smells bad.
There is bad blood between them.
He has a bad habit of interrupting.
The company is in a bad state.
It is a bad sign for the economy.
She feels bad about what happened.
The situation went from bad to worse.
He is a bad influence on his friends.
We had a bad run of luck.
The policy had bad consequences for the staff.
He has a bad reputation in the industry.
It was a bad faith attempt to deceive us.
The weather took a bad turn.
She is in a bad mood today.
The project suffered from bad management.
It is a bad idea to ignore the warnings.
He is not a bad guy, just misunderstood.
The systemic failure led to bad outcomes for everyone.
His bad judgment cost the firm millions.
The film received bad reviews from critics.
It is a bad precedent to set for future cases.
The bad air quality is a major concern.
She gave a bad account of the events.
The bad timing ruined our plans.
He made a bad call during the game.
The bad blood between the families lasted for generations.
It was an act of bad faith by the board.
The bad press damaged their image.
His bad temper often led to conflicts.
The bad state of the infrastructure is undeniable.
It is a bad omen for the upcoming season.
The bad blood was finally resolved.
She had a bad feeling about the deal.
よく使う組み合わせ
Idioms & Expressions
"bad blood"
hostility or resentment
There is bad blood between the two neighbors.
neutral"a bad egg"
a dishonest person
Don't trust him; he's a bad egg.
casual"bad-mouth"
to criticize someone
Stop bad-mouthing your boss.
casual"go from bad to worse"
to deteriorate
The project went from bad to worse.
neutral"a bad break"
unlucky event
He had a bad break when he lost his job.
casual"bad faith"
dishonest intent
They negotiated in bad faith.
formalEasily Confused
Adverb vs adjective
Badly describes actions; bad describes nouns.
He played badly (adv) vs He is a bad player (adj).
Comparative form
Worse is for comparing two things.
This is worse than that.
Superlative form
Worst is for comparing three or more.
This is the worst day ever.
Moral weight
Evil is stronger and strictly moral.
He is an evil man vs He is a bad man.
Sentence Patterns
Subject + is + bad
The movie is bad.
It is a bad + noun
It is a bad idea.
Subject + feel + bad + about
I feel bad about it.
Subject + be + bad + for + noun
Sugar is bad for you.
Subject + go + bad
The food will go bad.
語族
Nouns
Adjectives
関連
How to Use It
10/10
Formality Scale
よくある間違い
Bad is irregular; it does not take -er.
Bad is irregular; it does not take -est.
Use 'bad' after linking verbs like feel.
Avoid overusing 'very bad' by using stronger words.
Use 'for' when referring to health or impact.
Tips
Memory Palace
Imagine a 'bad' apple on your desk.
Native Speaker Tip
Use 'bad' for general situations.
Cultural Insight
It is a very common word.
Grammar Shortcut
Bad = adjective, Badly = adverb.
Say It Right
Rhymes with sad.
Don't Say Badder
Always use worse.
Did You Know?
It has no clear origin.
Study Smart
Use synonyms to improve level.
Better Writing
Replace bad with precise adjectives.
Fluency Tip
Use 'bad' with 'very' for emphasis.
Memorize It
Mnemonic
B-A-D: Being Always Disappointing.
Visual Association
A rotten, brown apple.
Word Web
チャレンジ
Try to use the word 'bad' in three different sentences today.
語源
Middle English
Original meaning: weak or wicked
文化的な背景
None.
Used universally in all English-speaking countries.
Practice in Real Life
Real-World Contexts
at work
- bad performance
- bad news
- bad decision
at school
- bad grade
- bad behavior
- bad influence
travel
- bad weather
- bad service
- bad luck
daily life
- bad mood
- bad habit
- feel bad
Conversation Starters
"What was the last bad movie you saw?"
"Do you have any bad habits you want to break?"
"How do you handle bad news?"
"Have you ever had a bad day at work?"
"What is the worst food you have ever tasted?"
Journal Prompts
Describe a time you made a bad decision.
Write about a bad habit and how to stop it.
Discuss why bad weather can change your mood.
Reflect on a time you turned a bad situation into a good one.
よくある質問
8 問No, it is an adjective. The adverb is 'badly'.
Yes, but 'terrible' or 'awful' is often better.
It is an irregular adjective.
Worst.
No, it is a standard word.
Yes, but it can sound harsh.
No, it often just means low quality.
Yes, but synonyms are preferred.
自分をテスト
The weather is ___ today.
Bad is the correct adjective here.
Which word means the opposite of bad?
Good is the antonym of bad.
Is 'badder' a correct word?
The comparative of bad is worse.
Word
意味
These are common idioms.
That is a bad idea.
スコア： /5
Summary
Bad is a simple but essential adjective used to describe anything that is not good, whether it is quality, behavior, or a situation.
- Bad is the opposite of good.
- It is an adjective used for quality or morality.
- The comparative is worse and the superlative is worst.
- It is a very common word in daily English.
Memory Palace
Imagine a 'bad' apple on your desk.
Native Speaker Tip
Use 'bad' for general situations.
Cultural Insight
It is a very common word.
Grammar Shortcut
Bad = adjective, Badly = adverb.
例文
The weather has been really bad lately.
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