GrammarN22 min read2026-02-17

としたら/とすれば/とすると

Conditional conjunctions expressing hypothetical situations and assumptions for N2 learners

Meaning

This grammar pattern functions as a conditional conjunction to express hypothetical or assumed situations. It is used when stating opinions, predictions, or imagined scenarios. The three forms (としたら/とすれば/とすると) are interchangeable, though とすると tends to be slightly more objective. They can attach to verbs, i-adjectives, na-adjectives, and nouns.

Formation

Part of speechFormation
動詞/い形容詞/な形容詞/名詞としたら/とすれば/とすると

Examples

  1. 空くじで一億円当たったとしたら、どんなことに使いたいですか。
    If you won 100 million yen in the lottery, what would you want to use it for?

  2. A:このデザインの色、お客さんが不満に思っているらしいよ。 B:色を変えるとすれば、担当の山本さんに相談しなきゃ。
    A: It seems the customers are dissatisfied with the color of this design. B: If we're going to change the color, we need to consult with Yamamoto, who's in charge.

  3. 明日の学会、佐藤教授が出ないとすると、誰が代わりに学会の挨拝をしてもらわなきゃ。
    If Professor Sato doesn't attend tomorrow's academic conference, we'll need to find someone to give the opening remarks in his place.

Summary

  • Use としたら/とすれば/とすると to express hypothetical conditions and assumptions
  • All three forms are largely interchangeable; とすると is slightly more formal/objective
  • Common in expressing opinions, predictions, and imagined scenarios in Japanese

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