English
Senior High

これはなんでinを付けてるんですか???

That river is dangerous to swim in. >あの川は泳ぐには危険です。 ←の形容詞を修飾

Answers

that river is dangerous to swim in
≒it is dangerous to swim in the river.

swim 泳ぐ
swim in 〜で泳ぐ

だからです

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