Portuguese Thinking Verb Rules and Examples With “Achar” and “Pensar”

Introduction

Understanding how Brazilians express thinking, opinion, and belief is essential for conversational Portuguese. This article explains the grammar and usage of the main thinking verbs, focusing on achar and pensar, with clear rules, conjugation patterns, and natural example sentences in Brazilian Portuguese. Learn when each verb takes a clause with que, an infinitive, or a direct object, plus useful cultural notes.

Overview: thinking verbs in Portuguese

Portuguese has several verbs that convey thought, opinion, belief, and perception. The two most common everyday verbs are achar and pensar. Other related verbs include acreditar, imaginar, and achar que used as a phrase. Each verb follows particular patterns when connecting to a clause, an infinitive, or a noun. Recognizing these patterns helps you form natural sentences and understand spoken Brazilian Portuguese.

General patterns to watch for

Three common patterns appear with thinking verbs:

– Verb + que + clause (subordinate declarative clause)
– Verb + infinitive (often with or without prepositions like em or de)
– Verb + direct object (noun or pronoun)

Which pattern to use depends on meaning, formality, and small differences between verbs. We will compare achar and pensar in detail.

The verb achar: primary uses and rules

Achar is extremely common in informal spoken Brazilian Portuguese and often translates to to think, to find, or to suppose. It can express an opinion, an impression, or a result of evaluation.

Achar + que + clause

Use achar + que + clause to give an opinion or state a belief. This is the most frequent pattern and equivalent to I think that in English.

Examples:
Eu acho que ele vai chegar cedo.
Ela acha que o filme é bom.
A gente acha que isso funciona melhor.

Grammar note: the clause after que uses the normal conjugation for the subject of that clause. There is no obligatory use of the subjunctive; indicative is standard when stating a belief or fact. Use subjunctive only when expressing doubt or non-factuality.

Achar + direct object (to find)

also means to find in the sense of to discover or to consider something to be a certain way. In this use it takes a direct object without que.

Examples:
Eu achei o livro na estante.
Ela achou o trabalho difícil.
Nós achamos a solução.

Note the subtle difference: Eu acho que ele é inteligente (I think that he is intelligent) versus Eu o acho inteligente (I consider him intelligent / I find him intelligent).

Achar + infinitive (colloquial)

Informally, speakers sometimes use achar + verb infinitive to express a personal inclination or expectation, though this is less formal than achar que + clause.

Examples:
Eu acho ir no cinema hoje uma boa ideia.
Eles acham não valer a pena esperar.

When using noun phrases or more complex clauses, prefer achar que + clause for clarity, especially in writing.

The verb pensar: primary uses and rules

Pensar is somewhat more formal and often emphasizes active thought, planning, or intention. Its most frequent patterns are similar to achar but with different nuances.

Pensar + que + clause

Use pensar + que + clause to express a considered opinion or belief. Like with achar, the subordinate clause uses normal conjugation.

Examples:
Eu penso que precisamos conversar.
Ela pensa que a festa é amanhã.

Cultural note: pensar can sound slightly more reflective or deliberate than achar, which is more casual and immediate in spoken language.

Pensar + em + infinitive (to intend or plan)

When talking about intentions, plans, or considering doing something, use pensar + em + infinitive. This pattern corresponds to thinking about doing something or planning to do it.

Examples:
Eu penso em viajar nas férias.
Eles pensam em mudar de casa.
Você pensou em ligar para ela?

Note that the preposition em is required in this usage. Without em, the meaning changes or the sentence becomes ungrammatical.

Pensar + em + noun (to consider)

Pensar + em + noun means to think about someone or something mentally or emotionally. It often expresses concern or regular mental consideration.

Examples:
Penso muito em meus amigos no exterior.
Ela pensava sempre no trabalho quando chegava em casa.

Comparing achar and pensar: how to choose

Which verb to use depends on nuance:

– Use achar for quick opinions, impressions, or to say you find something to be a certain way.
– Use pensar for more deliberate thought, planning, or when expressing intention with em + infinitive.
– Both can take que + clause when reporting an opinion, but achar is more colloquial.

Examples showing contrast:
Eu acho que ele está cansado. (I reckon / I think he is tired; casual impression)
Eu penso que ele precisa descansar. (I think / I consider that he needs to rest; more considered conclusion)
Estou pensando em estudar medicina. (I am thinking about studying medicine; planning/intention)
Acho estudar medicina difícil, mas interessante. (I find studying medicine difficult but interesting; evaluation)

Subjunctive and negation with thinking verbs

Portuguese uses the subjunctive mood after thinking verbs in specific contexts involving doubt, uncertainty, emotion, or non-reality. With achar and pensar, the indicative is standard for stating beliefs. Use the subjunctive when the speaker expresses doubt, uncertainty, or when the clause is negative and implies doubt.

Examples:
Não acho que ele venha hoje. (I don’t think he will come today; indicative because this expresses belief but negative creates a sense of doubt — many speakers still prefer indicative in spoken Portuguese)
Duvido que ele venha hoje. (I doubt that he will come today; subjunctive: venha)

Note: After verbs that explicitly communicate doubt such as duvidar, negar, or não acreditar, use the subjunctive in the subordinate clause. With achar and pensar, native usage varies; learners should pay attention to context and common patterns in Brazilian Portuguese. When expressing strong doubt, prefer verbs that clearly trigger subjunctive.

Pronouns, object placement, and clitic rules

When using direct objects or pronouns with achar and pensar, Brazilian Portuguese typically places clitic pronouns after the verb in affirmative sentences, though placement rules vary with formality and sentence type.

Examples with clitics:
Eu achei-o interessante. (more formal, European style) — in Brazilian Portuguese you would more commonly hear:
Eu o achei interessante.
Não acho isso importante.
Você pensou nela? (Did you think about her?)

Cultural note: In spoken Brazilian Portuguese, clitic placement is often flexible and subject pronouns are commonly omitted. Use simpler structures when learning: eu acho, eu penso, achei, pensei.

Common collocations and set phrases

Some fixed expressions with these verbs are useful to learn.

With achar:
achar que sim / achar que não — to think so / to think not
achar bom / achar ruim — to find good / to find bad
achar graça — to find something funny (also to give charm)

With pensar:
pensar bem — to think carefully, to reconsider
pensar melhor — to change one’s mind after reflection
pensar alto — to think out loud

Examples:
Eu acho que sim, podemos ir hoje.
Pensei bem e decidi não aceitar o emprego.
Ele pensou alto durante a reunião.

Colloquial variations and spoken Brazilian Portuguese

In informal spoken Brazilian Portuguese, contractions and reduced forms are common. Speakers often use eu acho, acho, and acho que without the subject pronoun. Similarly, pensar em often appears as pensar em + infinitive or noun with casual phrasing.

Examples in casual speech:
Acho que tá bom. (I think it’s fine.)
Tava pensando em ir, mas não deu. (I was thinking about going, but it didn’t work out.)
Eu acho meio arriscado. (I think it’s kind of risky.)

Cultural note: Brazilians rely heavily on context and tone for opinion statements. Using achar can signal a friendly, low-commitment opinion, while pensar may suggest more reflection.

Practical tips for learners

– Start by using achar que + clause for casual opinions and pensar em + infinitive for plans.
– Pay attention to whether you want to express immediate impression (use achar) or considered thought/plan (use pensar).
– Listen to native Brazilian Portuguese: news, podcasts, and conversations show natural patterns for que, em, and infinitives.
– When in doubt about mood (indicative vs subjunctive), follow common patterns: use indicative for straightforward beliefs and use verbs that explicitly express doubt for subjunctive contexts.

Examples: full-sentence walkthroughs

Below are sentences with short explanations to consolidate the rules.

Eu acho que ela está ocupada.
Explanation: achar que + clause expresses a casual opinion about her state.

Eu a acho simpática.
Explanation: achar + direct object means to consider someone friendly.

Estamos pensando em mudar de cidade.
Explanation: pensar em + infinitive expresses a plan or intention.

Ele pensou que era fácil, mas não foi.
Explanation: pensar que + clause reports a belief that turned out to be incorrect.

Você acha que vale a pena?
Explanation: Common question using achar que to ask for an opinion.

Conclusion

Mastering achar and pensar will make your spoken and written Brazilian Portuguese sound natural and precise. Remember the main patterns: achar often pairs with que for opinions and with direct objects for evaluations, while pensar uses em + infinitive for plans and em + noun for thinking about someone or something. Pay attention to nuance, practice listening for usage in real contexts, and gradually incorporate these verbs into your speech for clearer, more native-like expression.