16.4 虛擬條件句的倒裝

　　虛擬條件句的從句部分如果含有were, should, 或had, 可將if省略，再把were, should或had 移到從句句首，實行倒裝。
　 Were they here now, they could help us.
　=If they were here now, they could help us.
　 Had you come earlier, you would have met him
　=If you had come earlier, you would have met him.　
　 Should it rain, the crops would be saved.
　=Were it to rain, the crops would be saved.

注意：
　 在虛擬語氣的從句中，動詞'be'的過去時態(tài)一律用"were"，不用was， 即在從句中be用were代替。
　 If I were you, I would go to look for him.
　　 如果我是你，就會去找他。
　 If he were here, everything would be all right.
　　 如果他在這兒，一切都會好的。

典型例題
　_____ to do the work, I should do it some other day.
A. If were I　　 B. I were　C. Were I　D. Was I
　 答案C. 在虛擬條件狀語中如果有were, should, had這三個詞，通常將if省略，主語提前, 變成 were, should, had +主語的形式。但要注意，在虛擬條件狀語從句中，省略連詞的倒裝形式的句首不能用動詞的縮略形式。如我們可說 Were I not to do., 而不能說 Weren't I to do.