回答

If I were rich,I would donate more money.

If it were sunny today,we would clean the park.

If tomorrow were Sunday,I could keep reading this (If it were Sunday tomorrow,) book.
私も学校でやりましたが、()のとこはどっちでもいいそうです

主語がIでもitでもwereにする、現在形の文でもcould.wouldにするのがポイントです👍

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