GrammarN32 min read2026-02-17

だろうと思う

Express tentative guesses or predictions in a polite, indirect way

Meaning

だろう is the plain form of でしょう, expressing uncertainty or conjecture. When combined with と思う, it conveys your tentative thoughts or predictions to others in a softened manner. This pattern allows you to share speculation without sounding too assertive, making it useful for expressing assumptions, expectations, or conjectures based on available information.

Formation

Part of speechFormation
动词普通形だろうと思う
な形容词だろうと思う
名词だろうと思う

Examples

  1. この映画は退屈だろうと思ったが、意外と面白かった。
    I thought this movie would probably be boring, but it was surprisingly interesting.

  2. 明日は会社が休みなので、歯医者に行けるだろうと思います。
    Since the company is closed tomorrow, I think I'll probably be able to go to the dentist.

  3. 彼女のために服を買った。気に入るだろうと思った。
    I bought clothes for my girlfriend. I thought she would probably like them.

Summary

  • Form: verb plain form + だろうと思う; na-adjective + だろうと思う; noun + だろうと思う
  • Used to express tentative guesses, predictions, or expectations in a polite, indirect manner
  • Colloquial variants: の/なの can be used before だろうと思う, or の can be replaced with ん for a more casual tone

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