手早い答え
achar は日常的な意見・印象、pensar は考える過程を強調します。
確実な見分け方は、英語から訳す前に、その単語の働きを見きわめることです。
それぞれの単語の働き
achar
to think or find
Use achar for an opinion, impression, or discovery, especially in everyday speech.
pensar
to think or consider
Use pensar for the mental process of reflecting, planning, or forming an opinion.
選び方
- achar: Choose achar if the sentence points to an opinion, impression, or discovery, especially in everyday speech.
- pensar: Choose pensar if the sentence points to the mental process of reflecting, planning, or forming an opinion.
例文
Acho que vai chover.
I think it is going to rain.
Preciso pensar antes de responder.
I need to think before answering.
よくある落とし穴
Both can introduce opinions, but their patterns differ: achar que algo and pensar em algo are especially common.
文脈の中で練習する
自分の実生活から文を一つ選び、二回書いてみましょう。一度はacharで、もう一度はpensarで。どちらも成り立ちそうなら、意味の違いを言葉にしてみましょう。