[自主訓練] 英文假設語氣

from here
條件子句+結果子句
1. 現在式+現在式 = 現在的事實
ex: If it rains all day, it get wet.

2. 過去式+過去式 = 過去的事實 (口語不常用)

3. 現在式+未來式 = 未來的事實
ex: If I come there, I will give you a call.

4. 現在式+現在助動詞(would/could/should/might)+原V = 未來可能的事實
ex: If he studies hard, he would not fail the exam.

5. 過去式+現在助動詞(would/could/should/might)+原V = 與現在事實相反
ex: If I were you, I would tell the truth.

6. 過去完成式+過去助動詞+have p.p. = 與過去事實相反
ex: If I had known the fact, I would have prepared some food.