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資料來源：http://englishhome.org/archives/6471

現在非事實條件句 (與現在事實相反的條件句)

句型：

1. If … 過去簡單式 …, … would + 動詞 …
2. … would + 動詞 … if … 過去簡單式 …

用法：

現在非事實條件句係用來談論現在虛構的情況。

例句：

• If I owned a car, I would drive to work. But I don’t own a car. (如果我有車，我會開車上班。但我沒有車)
• Janet would travel around the world if she had more money. But she doesn’t have much money. (如果珍妮有更多的錢，她會去環遊世界。但她沒有很多錢)
• I would move to South Korea if I spoke Korean. (如果我會說韓語，我會搬到南韓)
• If he studied harder, he would pass the exam. (如果他再用功一點，他會通過考試)
• A: What would you do if you won the lottery? (如果你中樂透，你會做什麼？)
  B: I would buy a mansion. (我會買一間豪宅)

在現在非事實條件句中，所有 BE 動詞一律使用 were，不可用 was，因為 was 被視為文法錯誤，所以在寫作或考試的情況中一定都要使用 were。然而，在日常會話中，我們經常使用 was。

例句：

• If he were Japanese, he would live in Kyoto. (如果他是日本人，他會住在京都)
• If Rachel were rich, she would buy a plane. (如果瑞秋富有，她會買一架飛機)
• I would play basketball if I were taller. (如果我高一點，我會去打籃球)
• I would buy that car if it were cheaper. (如果那部車便宜一點，我會買下它)
• I would buy that car if it was cheaper. (誤) － 但經常用於會話中。

僅能使用 If

現在非事實條件句只能使用 if，不可用 when，因為它談論的是與現在事實相反的虛構情況。

例句：

• I would buy that car if it were cheaper. (正)
• I would buy that car when it were cheaper. (誤)

在現在非事實條件句中，除了 would 外，還可使用 should, could, might 這三個情態助動詞。

例句：

• If Robert invited me, I really should go. (如果羅伯特邀請我，我真的應該去)
• If you went to Egypt, you could learn Arabic. (如果你去埃及，你就能學阿拉伯語)
• If Cindy had time, she might go to the party. (如果辛蒂有時間，她可能參加派對)

資料來源：http://englishhome.org/archives/6471