(江苏专用)2017届高考英语二轮复习课件：第二部分专题六情态动词和虚拟语气_高考复习指南

　　Ⅲ.正反探究 1.【误】 The streets are all dry；it mustn't have rained last night.

　　【正】 The streets are all dry；it can't have rained last night.

　　解析　对某一事实的否定推测不能用mustn't，而要用 can't 或 couldn't 表示“不可能”。 2.【误】 I didn't see Mary at the meeting yesterday.She might be ill，I guess.

　　【正】 I didn't see Mary at the meeting yesterday.She might have been ill，I guess.

　　解析　猜测的事情发生在昨天，因此要用“情态动词＋ have done”的形式。当动词是 be

　　时，很容易忽略它的时态意义，要特别留意。

　　3.【误】

　　The fire spread through the hotel quickly，but everyone could get out.

　　【正】

　　The fire spread through the hotel quickly，but everyone was able to get out.

　　解析　表示成功地做到了某事，肯定句中通常用was able to do sth。 4.【误】 Will I open the window for you?

　　【正】 Shall I open the window for you?

　　解析　shall 与第一、第三人称连用，表示征求意见或请求指示，这时不可用will。will通常与第二人称连用，即 Will you...?

　　5.【误】 Hadn't they saved us，we would have been drowned in the stormy river.

　　【正】 Had they not saved us，we would have been drowned in the stormy river.

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