～としたら
to shitara
If we suppose that; if it were the case that
Formation 接続
Plain clause + としたら; N / な-adjective stem + だとしたら
Explanation 説明
Introduces an imagined situation or accepts a proposition temporarily in order to consider its consequences. The second part may be a question, judgment or proposed response.
Examples 例文
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彼女に誕生日プレゼントをあげるとしたら、何がいいと思う？
If you were to give her a birthday present, what do you think would be good?
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電車で行くとしたら、時間はどのくらいかかりますか。
If we went by train, how long would it take?
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もし俳優になっていなかったとしたら、今頃医者になっていただろう。
If I had not become an actor, I would probably be a doctor by now.
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その情報が確かだとしたら、大変なことだ。
If that information is correct, it is a serious matter.
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今日が最後の日だとしたら、何をしますか
If today were your last day, what would you do?
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そうだとしたら少しでも早く準備をしよう
If that is the case, let us start preparing as soon as possible.
How related patterns differ 比較
としたら/とすれば sets an assumption. さえ～ば presents a condition considered sufficient, whereas ないことには presents a necessary condition. てからでないと sets an ordering prerequisite. ても and としても describe a result that still holds under the stated condition.
| Pattern | Meaning | Example |
|---|---|---|
| ～としたら | If we suppose that; if it were the case that | 彼女に誕生日プレゼントをあげるとしたら、何がいいと思う？ If you were to give her a birthday present, what do you think would be good? |
| ～さえ～ば | As long as; if only a minimum condition is met | 田中さんは暇さえあれば、本を読んでいます。 Whenever Mr. Tanaka has any free time, he reads. |
| ～ても | Even if; even though; related permission expressions | クラスでスマホを使ってもいいですか。 May I use my smartphone in class? |
| ～てからでないと／からでなければ | Not until after; unless one first does | 予約をしてからでないと、この店には入れません。 You cannot enter this restaurant unless you make a reservation first. |
| ～ないことには | Unless; without first doing | 実際に使ってみないことには、便利かどうか分かりません。 Unless I actually try it, I cannot tell whether it is convenient. |
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