英倫翻譯社/ Trsmaster

A：這當然對! 在問題的條件句中，If John were a good student (如果約翰是個好學生) 是個與現在事實相反的 if 子句，而 he would have studied for the exam yesterday (他昨天就會為考試用功讀書) 則是個與過去事實相反的結果子句。事實上，這種過去與現在時間混合的條件句頗為常見。

一般而言，if 子句和結果子句所表示的時間都是一致的，即兩個子句都是與現在或過去事實相反。例如：

與現在事實相反的條件句：

• If I were you, I would marry Rachel. (如果我是你，我會跟瑞秋結婚)
• If I had enough money, I would buy a house. (如果我有足夠的錢，我會買一間房子)
• If I had enough money, I could buy a house. (如果我有足夠的錢，我可能買一間房子)
  － 在上面的例句中，would 是表示想要或可預測的結果，而 could 表示一個可能的結果。

與過去事實相反的條件句：

• If Bill had studied, he would have passed the exam. (如果比爾用功讀書，他已經通過考試)
• If I had had enough money, I would have bought a house. (如果我有足夠的錢，我會買一間房子)
• If I had had enough money, I could have bought a house. (如果我有足夠的錢，我可能買一間房子)
  － 同樣地，在上面的例句中，would 是表示想要或可預測的結果，而 could 表示一個可能的結果。

然而，如上述，過去與現在時間混合的條件句亦所在多有。例如：

• If Mary had eaten dinner, she wouldn’t be hungry now. (如果瑪麗有吃晚餐，她現在就不會餓)
• If I were you, I would have told her the truth. (如果我是你，我會對她說實話)