〜ではないか
〜ではないか means isn't it; is it not. It is a JLPT N4 grammar point. 「〜ではないか」 is used to confirm a fact or state an opinion with some emphasis. It sounds more formal or written than 「じゃないか」. It is also used when presenting an opinion as a suggestion.
Japanese sources describe it as 「少しかたい確認・主張」.
〜ではないか examples
これは大切ではないか。
Isn't this important?
これはいい考えではないか。
Isn't this a good idea?
〜ではないか exercises
Pick what belongs in the parentheses. The answer is marked below.
これは大きな問題（ ）。
- かな
- かい
- ではないか ✓
- そうに
Isn't this a big problem?
これはいい考え（ ）。
- そうな
- ではないか ✓
- かしら
- と言ってもいい
Isn't this a good idea?
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