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A2 verb 11分钟阅读

propagar

例句 propagar 30秒了解
解析 propagar in your Level:
At the A1 level, you don't need to use 'propagar' very often. You will mostly use the word 'espalhar' which means 'to spread'. However, you might see 'propagar' in very simple signs or health warnings. Think of it as a fancy way to say that something is moving from one person to another or from one place to another. For example, if you see a poster about a cold or the flu, it might use this word. At this stage, just remember that it is a verb that ends in '-ar', so it follows the regular conjugation rules like 'falar' or 'cantar'. You can recognize it because it looks like the English word 'propagate'. If you want to say 'The virus spreads', you can say 'O vírus se propaga'. It is a good word to recognize when reading basic news headlines about health or nature. Don't worry about the complex scientific uses yet; just focus on the basic idea of something moving and growing in area.
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At the A2 level, you should start to distinguish between 'espalhar' (common spread) and 'propagar' (more formal or technical spread). You will encounter this word when talking about news and social media. In A2, you are learning to describe events and trends. 'Propagar' is perfect for saying that a video went viral or that a rumor is going around the office. You should also be comfortable with the reflexive form 'se propagar'. For example, 'A notícia se propagou rápido' (The news spread fast). You might also use it in basic gardening contexts if you are interested in hobbies. It is a regular verb, so practicing its past tense (pretérito perfeito) is useful: eu propaguei, você propagou, eles propagaram. Notice the 'u' in 'propaguei' to keep the sound hard. This level is about moving from basic vocabulary to slightly more specific terms that make your Portuguese sound more mature and less repetitive.
By the B1 level, you are expected to use 'propagar' in more varied contexts, including physics and social issues. You should understand the difference between 'propagar' (to spread/propagate) and 'divulgar' (to make public). B1 learners should be able to use the verb in the future and conditional tenses to discuss consequences. For example, 'Se as pessoas continuarem saindo, a doença vai se propagar' (If people continue going out, the disease will spread). You will also start to see it in more complex reading materials, like magazine articles or blog posts about technology and science. You should be aware of the noun form 'propagação' (propagation) as well. At this stage, you are using the word to describe phenomena like sound waves or the spread of political ideas. It becomes a tool for more abstract discussion, allowing you to move beyond simple descriptions of physical objects to discussing how invisible things like energy and thoughts move through society.
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At the B2 level, 'propagar' should be a natural part of your vocabulary for formal writing and debate. You should be able to use it to discuss complex topics like the 'propagação de notícias falsas' (spread of fake news) or the 'propagação de espécies invasoras' (spread of invasive species). B2 learners should master the nuances of the reflexive vs. non-reflexive use. You should also be able to use it in the subjunctive mood to express opinions or doubts: 'Não acho que essa ideia se propague facilmente' (I don't think this idea will spread easily). You will encounter this word in literature and more serious journalism. You should also be able to distinguish it from 'proliferar' (to multiply rapidly) and 'disseminar' (to scatter/sow). Your use of 'propagar' at this level shows that you can handle technical and abstract Portuguese with a high degree of precision, choosing the word specifically for its connotations of continuous, often systemic, expansion.
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At the C1 level, you use 'propagar' with full command of its stylistic and technical implications. You understand its role in academic discourse, particularly in the humanities and sciences. You can discuss the 'propagação de impulsos nervosos' or the 'propagação de ondas eletromagnéticas' with ease. In social contexts, you use it to analyze the 'propagação de ideologias' or 'normas culturais'. You are also aware of the historical and etymological roots of the word, which might influence how you use it in creative writing or formal speeches. C1 learners can use the verb in complex grammatical structures, such as the personal infinitive or the future subjunctive, without hesitation. You might use it metaphorically in literature to describe the spread of a feeling or a state of mind: 'O medo se propagou pela cidade como uma névoa densa'. Your vocabulary is rich enough that 'propagar' is just one of many tools you have to describe the movement of things, and you choose it specifically for its formal, scientific, or expansive weight.
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At the C2 level, your understanding of 'propagar' is indistinguishable from that of an educated native speaker. You are sensitive to the subtle prosody and rhythm the word brings to a sentence. You can use it in highly specialized legal, scientific, or philosophical texts. You might explore its use in the history of the Catholic Church (Sacra Congregatio de Propaganda Fide) and how that shaped the modern word 'propaganda'. You can use the word in sophisticated wordplay or irony. You are also fully aware of regional differences in its usage between Brazil, Portugal, Angola, and Mozambique, including the placement of reflexive pronouns and preferred synonyms in different dialects. For a C2 learner, 'propagar' is not just a verb but a concept that you can manipulate to suit any register, from a highly technical laboratory report to a poetic description of light propagating through a prism. You use it to convey not just the fact of spreading, but the very essence of the mechanism by which something expands.
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例句

propagar 30秒了解

  • Propagar is a Portuguese verb meaning 'to spread' or 'to propagate', used for news, diseases, waves, and plants.
  • It is often used reflexively as 'se propagar' when describing natural phenomena like sound or fire.
  • The verb is more formal and technical than 'espalhar', making it suitable for scientific and academic contexts.
  • It follows regular '-ar' verb conjugation rules, but requires a 'u' in the first-person past 'propaguei'.

The Portuguese verb propagar is a multifaceted term that primarily describes the act of spreading, multiplying, or extending something from one point to another. While it is often associated with the biological reproduction of plants or the transmission of diseases, its usage in modern Portuguese has expanded significantly into the realms of information technology, social media, and physics. When you use propagar, you are describing a process that is usually continuous and expansive. It is not just about moving something; it is about that thing increasing in reach or volume as it moves.

Literal Biological Use
In botany, propagar refers to the reproduction of plants. Farmers and gardeners use this word when they discuss techniques to create new plants from seeds, cuttings, or grafting. It implies a deliberate effort to increase the population of a specific species.

O jardineiro conseguiu propagar as raras orquídeas através de sementes selecionadas no laboratório.

Epidemiological Context
In the context of health and medicine, the word is frequently used to describe how viruses, bacteria, or infections spread through a population. It carries a sense of urgency and often a negative connotation when referring to a pandemic or an outbreak.

Sem as medidas de higiene adequadas, o vírus pode se propagar rapidamente por toda a comunidade local.

In the digital age, propagar has become a staple in discussions about viral content and fake news. When an idea, a rumor, or a specific piece of information starts to be shared by thousands of people across different platforms, we say that the information is being propagated. This usage highlights the speed and the exponential nature of modern communication. It is also used in physics to describe how waves, such as light or sound, travel through different media like air, water, or a vacuum. Understanding the medium is essential to understanding how the energy will propagar.

As ondas sonoras não conseguem se propagar no vácuo do espaço sideral profundo.

Sociological Impact
Sociologists use the term to describe the diffusion of cultural norms, languages, or political ideologies. It suggests a movement that crosses borders and influences different groups of people over time.

O objetivo do movimento era propagar ideais de igualdade e justiça social em todos os continentes.

A empresa utiliza as redes sociais para propagar a sua nova imagem de marca para o público jovem.

Using propagar correctly involves understanding whether the action is being performed on something (transitive) or if the thing is spreading on its own (reflexive). This distinction is crucial for natural-sounding Portuguese. When you are the agent of the spreading, you use the direct form. For example, if you are spreading a message, you are 'propagando uma mensagem'. However, if you are talking about a wildfire or a disease that is spreading by itself, you must use the reflexive form 'se propagar'. This grammatical nuance changes the perspective of the sentence from active intervention to an observation of a process.

Transitive Usage (Active Spreading)
In this form, there is a subject that actively causes the spread. This is common in marketing, activism, and gardening. You are 'propagating' something specific.

Nós precisamos propagar a notícia sobre o evento beneficente o mais rápido possível.

Reflexive Usage (Automatic/Natural Spreading)
This is used when the phenomenon spreads due to its own nature or environment. Physics and epidemiology frequently use this structure.

A luz do sol costuma se propagar em linha reta através do ar atmosférico.

The verb also appears in various tenses to describe different states of spreading. In the present tense, it describes a current trend or a scientific fact. In the past, it often describes the origin of a rumor or the history of a biological species. When using the future tense, it often serves as a warning or a goal. For example, 'Se não pararmos agora, o boato irá se propagar' (If we don't stop now, the rumor will spread). It is important to match the preposition correctly; usually, something propagates 'por' (through/across) a place or 'entre' (among) a group of people.

A ideologia começou a se propagar entre os estudantes universitários na década de sessenta.

Conditional Contexts
Often used in 'if' clauses to discuss potential consequences of information flow or biological growth.

Se você propagar mentiras, acabará perdendo a confiança de todos os seus amigos.

O calor do incêndio se propaga rapidamente através das estruturas de madeira da casa.

In everyday life, you might not hear propagar as often as its more common cousin 'espalhar', but it is a frequent guest in specific environments. If you watch the evening news (Jornal Nacional in Brazil or Telejornal in Portugal), you will hear news anchors using propagar when reporting on public health crises. They might say, 'As autoridades estão preocupadas com a velocidade com que a nova variante se propaga'. This gives the report a tone of scientific seriousness and official weight. It is the language of experts and reporters who want to convey precise information about the scope of an issue.

The World of Social Media
Influencers and digital marketing specialists often talk about how to propagar a brand's message. They analyze algorithms to see which posts have the highest potential to propagate across different user networks.

O vídeo viralizou e começou a se propagar por todas as plataformas digitais em poucas horas.

Scientific and Academic Lectures
In a university setting, specifically in physics or biology departments, propagar is the standard term. You will hear professors discussing the propagation of electromagnetic waves or the propagation of nerve impulses in the human body.

O impulso nervoso se propaga ao longo do axônio até atingir a fenda sináptica seguinte.

Another common place to encounter this word is in environmental reports. When discussing forest fires, firefighters and meteorologists use propagar to explain how wind conditions help the flames move. They might say, 'O vento forte ajudou as chamas a se propagarem pela floresta seca'. Here, the word conveys a sense of uncontrollable movement. Similarly, in legal or political documents, you might read about the prohibition of propagating certain types of hate speech or illegal content. It is a word that carries the weight of the law and the precision of science.

É proibido por lei propagar discursos que incentivem a violência contra minorias étnicas.

Gardening and Agriculture
If you visit a nursery (horto), you will see signs or hear staff talking about how to propagate specific plants. It is the technical term for breeding and growing.

Esta espécie de suculenta é muito fácil de propagar usando apenas uma folha pequena.

Os cientistas estudam como o som se propaga em diferentes profundidades do oceano Atlântico.

One of the most frequent errors for English speakers learning Portuguese is the misuse of the reflexive pronoun with propagar. In English, 'to spread' can be used both transitively and intransitively without a change in the verb's form ('The news spread' vs. 'He spread the news'). In Portuguese, however, if the news is doing the spreading, you must say 'A notícia se propagou'. Forgetting the 'se' makes the sentence sound incomplete or grammatically incorrect to a native speaker. It's like saying 'The news propagated itself' in English, which is more common in Portuguese than the simple 'The news propagated'.

Confusing with 'Espalhar'
While they are synonyms, 'espalhar' is much more informal. Using 'propagar' when talking about spreading butter on bread or spreading toys on the floor is a mistake. Propagar is for abstract concepts, biological growth, or physical waves.

Errado: Eu vou propagar manteiga no pão. (Correct: espalhar manteiga).

Preposition Errors
Learners often use the wrong prepositions. You propagate something por (through/throughout) a place, not em cima de (on top of) unless it's a very specific physical context. Using 'para' is common when talking about the target audience.

A doença se propaga pelo ar, e não apenas pelo contato direto entre as pessoas.

Another mistake is the spelling. Some learners confuse it with 'propaganda'. While they share the same Latin root, 'propaganda' is a noun (advertising/propaganda) and propagar is the verb. You 'faz propaganda' (do advertising) to 'propagar uma marca' (spread a brand). Also, pay attention to the conjugation in the subjunctive mood. Learners often struggle with 'que ele propague', accidentally using 'propaga' or 'propaguia'. The 'u' after the 'g' is essential in the subjunctive to maintain the hard 'g' sound before the letter 'e'.

É importante que a escola propague valores de tolerância e respeito mútuo.

Overusing Formal Language
Using propagar in a very casual conversation about a small rumor might sound a bit 'stiff' or overly dramatic. In casual talk, prefer 'contar' or 'espalhar'.

Não propague fofocas se você não tem certeza absoluta de que são verdadeiras.

O calor se propaga por condução através da barra de metal aquecida.

Understanding the synonyms of propagar helps you choose the right word for the right register. While propagar is versatile, Portuguese offers several other verbs that might be more precise depending on whether you are talking about news, biological growth, or the physical scattering of objects. Choosing the right alternative can make you sound more like a native speaker and less like a textbook. The nuances between these words often lie in the speed of the action, the medium involved, and the formality of the situation.

Espalhar vs. Propagar
'Espalhar' is the most common and informal alternative. It works for everything from spreading toys to spreading rumors. Propagar is more technical and implies a process of multiplication or transmission of waves/ideas.

Ele espalhou as roupas pela cama, enquanto o rádio propagava a música pela casa.

Difundir vs. Propagar
'Difundir' is often used for the wide dissemination of knowledge, culture, or radio signals. It has a very positive and intellectual connotation. Propagar is more neutral and can be used for viruses as well.

A biblioteca tem como missão difundir a literatura clássica entre os jovens leitores.

In more scientific or formal contexts, you might encounter 'proliferar'. This verb specifically emphasizes the rapid multiplication of something, like cells or bacteria. While propagar focuses on the movement and extension, 'proliferar' focuses on the increase in numbers. In the world of technology, 'reproduzir' might be used for files or data, but propagar is still preferred for the spread of signals or network updates. Knowing when to switch from the common 'espalhar' to the professional propagar is a key milestone in reaching B2 or C1 proficiency.

As notícias falsas costumam proliferar em períodos de incerteza política e social.

Divulgar vs. Propagar
'Divulgar' is the standard word for 'to announce' or 'to make public'. Use it for events, results, or new products. Propagar implies that once the news is out, it continues to spread on its own.

A empresa vai divulgar os resultados financeiros amanhã de manhã para a imprensa.

O som se propaga mais rapidamente na água do que no ar atmosférico.

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按水平分级的例句

1

O vírus pode se propagar.

The virus can spread.

Uses 'se' because the virus spreads by itself.

2

A notícia vai se propagar.

The news will spread.

Future with 'ir' + infinitive.

3

O som se propaga no ar.

Sound spreads in the air.

Present tense, reflexive.

4

Não propague mentiras.

Do not spread lies.

Negative imperative (command).

5

As plantas se propagam aqui.

The plants spread here.

Plural present tense.

6

O fogo se propaga rápido.

The fire spreads fast.

Adverb 'rápido' modifying the verb.

7

Vamos propagar a paz.

Let's spread peace.

First person plural 'vamos' + infinitive.

8

A luz se propaga na água.

Light spreads in the water.

Simple scientific statement.

1

Eles querem propagar a nova marca.

They want to spread the new brand.

Transitive use (active action).

2

O boato se propagou pela escola inteira.

The rumor spread through the whole school.

Pretérito perfeito (past tense).

3

Como podemos propagar esta ideia?

How can we spread this idea?

Interrogative sentence.

4

A gripe se propaga no inverno.

The flu spreads in the winter.

General fact in the present tense.

5

O calor se propaga pelo metal.

Heat spreads through the metal.

Preposition 'pelo' (per + o).

6

Ela gosta de propagar boas notícias.

She likes to spread good news.

Infinitive after the verb 'gostar'.

7

O som não se propaga no vácuo.

Sound does not spread in a vacuum.

Negative scientific fact.

8

Precisamos propagar o uso de máscaras.

We need to spread the use of masks.

Verb 'precisar' + infinitive.

1

As redes sociais ajudam a propagar fake news.

Social networks help to spread fake news.

Complex subject 'as redes sociais'.

2

O incêndio se propagou devido ao vento forte.

The fire spread due to the strong wind.

Cause indicated by 'devido a'.

3

É necessário propagar o conhecimento científico.

It is necessary to spread scientific knowledge.

Impersonal expression 'é necessário'.

4

A cultura brasileira se propaga pelo mundo.

Brazilian culture spreads through the world.

Reflexive use for abstract concepts.

5

Eles estão propagando uma campanha de vacinação.

They are spreading a vaccination campaign.

Present continuous (gerúndio).

6

A luz se propaga em linha reta.

Light travels (propagates) in a straight line.

Technical/scientific description.

7

O medo se propagou rapidamente entre a multidão.

Fear spread quickly among the crowd.

Adverb 'rapidamente' and preposition 'entre'.

8

Não devemos propagar informações falsas.

We should not spread false information.

Modal verb 'dever' + negative.

1

A empresa investe para propagar sua filosofia sustentável.

The company invests to spread its sustainable philosophy.

Conjunction 'para' indicating purpose.

2

Ondas eletromagnéticas se propagam no espaço.

Electromagnetic waves propagate in space.

Technical terminology.

3

Duvido que esse boato se propague por muito tempo.

I doubt that this rumor will spread for a long time.

Present subjunctive after 'duvido que'.

4

O movimento feminista se propagou por toda a Europa.

The feminist movement spread across all of Europe.

Historical context.

5

Se o solo estiver seco, as sementes não vão se propagar.

If the soil is dry, the seeds will not spread.

Conditional sentence with 'se'.

6

A internet facilitou a propagação de novas línguas.

The internet facilitated the spread of new languages.

Noun form 'propagação' used here.

7

O governo tentou impedir que a revolta se propagasse.

The government tried to prevent the revolt from spreading.

Imperfect subjunctive after 'impedir que'.

8

A música clássica se propaga através das gerações.

Classical music spreads through generations.

Metaphorical use of time.

1

A ideologia neoliberal se propagou de forma hegemônica.

The neoliberal ideology spread in a hegemonic way.

Advanced political vocabulary.

2

O som se propaga por meios elásticos como o ar e a água.

Sound propagates through elastic media such as air and water.

Scientific precision.

3

É imperativo que propaguemos valores de ética e integridade.

It is imperative that we spread values of ethics and integrity.

First person plural subjunctive 'propaguemos'.

4

A praga se propagou silenciosamente pelas plantações de café.

The pest spread silently through the coffee plantations.

Adverbial use 'silenciosamente'.

5

O autor utiliza a metáfora para propagar sua visão de mundo.

The author uses metaphor to spread his worldview.

Literary analysis context.

6

A velocidade com que a luz se propaga é constante no vácuo.

The speed at which light propagates is constant in a vacuum.

Relative clause 'com que'.

7

A resistência cultural se propaga em espaços de marginalidade.

Cultural resistance spreads in marginalized spaces.

Sociological terminology.

8

Caso a notícia se propague, as ações da empresa cairão.

In case the news spreads, the company's shares will fall.

Conjunction 'caso' + subjunctive.

1

A exegese bíblica serviu para propagar dogmas milenares.

Biblical exegesis served to propagate ancient dogmas.

Highly formal/theological context.

2

Ondas sísmicas se propagam de forma distinta em rochas ígneas.

Seismic waves propagate differently in igneous rocks.

Geological precision.

3

A desinformação se propaga por algoritmos de opacidade radical.

Disinformation spreads through algorithms of radical opacity.

Advanced technological/philosophical phrasing.

4

O pensamento iluminista propagou-se célere pelas cortes europeias.

Enlightenment thought spread swiftly through European courts.

Enclitic pronoun 'se' (Portugal style) and archaic adverb 'célere'.

5

A necrose começou a se propagar pelos tecidos adjacentes.

The necrosis began to spread through the adjacent tissues.

Clinical/Medical precision.

6

Propagar o ódio é crime tipificado no código penal vigente.

Spreading hate is a crime specified in the current penal code.

Legal terminology 'tipificado'.

7

A ressonância magnética baseia-se em como o sinal se propaga.

Magnetic resonance is based on how the signal propagates.

Physics in medicine context.

8

O mito de Sísifo propaga-se como metáfora da condição humana.

The myth of Sisyphus propagates as a metaphor for the human condition.

Philosophical/Existential use.

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