微英語 - 1000語法細節(jié):虛擬語氣005

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有一種"含蓄虛擬條件句"是指沒有出現(xiàn)用if引導的條件句，而條件句的意思是用其他方式表達的。如：without, but for, otherwise, or, but that, given, provided, supposing, were it not for等等。例如：Given me more time, I would have worked out a more perfect scheme.

標簽：虛擬、句型　　難度（6）｜用途（4）｜標記（ ）

在含蓄條件句中，有些條件從句不表達出來，只暗含在副詞、介詞短語、上下文或其他方式中。比如，條件可以暗含在短語中，如without...，but for...等。比如：But for his help, we would be working now./Without your instruction, I would not have made such great progress.

標簽：條件句、意義　　難度（6）｜用途（5）｜標記（ ）

把條件暗含在短語中的含蓄條件句是很常見的。如：We didn't know his telephone number；otherwise we would have telephoned him.暗含條件是otherwise；Without your help, we wouldn't have achieved so much.暗含條件是介詞短語without your help。

標簽：條件、短語　　難度（5）｜用途（4）｜標記（ ）

在whatever, whichever, whenever, whoever, wherever, however, no matter wh-等引導的讓步狀語從句中，如果指現(xiàn)在或將來，從句虛擬語氣結構為may＋do。比如：We will finish it on time no matter what may happen.如果指過去，從句要用may＋have done。比如：You mustn't be proud whatever great progress you may have made.

標簽：虛擬、引導詞　　難度（4）｜用途（6）｜標記（ ）

熱門詞匯

otherwise adv. 否則；另外

provided conj. 假如；倘若

perfect adj. 完美的；最好的

scheme n. 計劃

instruction n. 指令；指示

achieve vt. 達到；完成

whatever conj. 無論什么

progress n. 進步，發(fā)展

我關注的話題

常用詞組--could have done

　　與"can have done"的意思差別很大，"could have done"是虛擬語氣，表示對過去事情的假設，意思是本來能夠做某事而沒有做。比如：He could have passed the exam, but he was too careless.（本來他能夠通過考試，但是他太粗心。）