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29．[2010·北京卷] —Good morning. I've got an appointment with Miss Smith in the Personnel Department. —Ah，good morning. You ________be Mrs. Peters. A．might B．must C．would D．can 【解析】 B 本题考查情态动词。根据句子意思“你肯定是Mrs. Peters”可知用must来表示肯定推测。 30．[2010·山东卷] I ________ have watched that movie—it'll give me horrible dreams. A．shouldn't B．needn't C．couldn't D．mustn't 【解析】 A shouldn't have done意为“本不应该做但实际已经做了(表达后悔的情绪)” 专题八 │ 实战演练 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must，而要用can't 或couldn't表示“不可能”。 专题八 │ 反面解读 反面解读 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】 猜的事情发生在昨天，因此要用情态动词＋have done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】 He must be very friendly at times. | 
