“情态动词+havedone”精编.ppt

A. could have stay B. could stay C. would stay D. must have stay A. had said B. said C. might say D. might have said A. must be B. must have been C. should be D. should have been A. must be B. must have been C. should be D. should have been A. might?? B. should???? C. can???? D. will mustn’t??? B. haven’t ????? C. can’t????? D. didn’t A. didn’t???? B. hasn’t?????? C. mustn’t??????? D. can’t --- Catherine, I have cleaned the room for you.--- Thanks. you ___ it. I could manage it myself. ( 05福建 31题) A. needn’t do??? B. needn’t have done?? C. mustn’t do??? D. shouldn’t have done 该句的意思是：凯萨琳,我已经帮你打扫屋子了， 其实你没有必要做的，我自己能处理的。 八、can/ could have done表示“本来能够做而实际 上没有做的事情”。例如： You could have come here a little earlier. 你本来可以早点来到这儿的。 She could have earned a lot of money. 她本来可以挣一大笔钱的。 * * * “情态动词＋have done”重点讲解 一、在虚拟条件句中，如果表示与过去事实相反的情况，从句用过去完成时，而主句中则用“情态动词＋现在完成时”， 即 would/ could/ should/ might have done 如果他学习努力， 他就会通过高考了。 If he had worked hard, he would have passed the Collage Entrance Examination. --- I stayed at a hotel while in New York. --- Oh, did you? You ___ with Barbara. (NMET98) 答案 A,本句是一个含蓄虚拟条件句，意思是：If you had stay at a hotel while in New York, you could have stayed with Barbara. 表达了与过去事实相反的情况。 2. Yesterday Jane walked away for discussion, otherwise, she ___ something she would regret later. ( 96上海) 答案D 本句考查的也是含蓄虚拟语气，意思是：如果她参加了讨论，她可能会说出一些后来令她后悔的话。表达了与过去事实相反的情况。 二、must have done 表示对过去已经发生过的情况的肯定推测判断，语气较强， 意思是 “一定……、肯定……” 昨天晚上一定是下雨了，因为今早地面是潮湿的。 It must have rained last night, for the ground is wet this morning. 1. I didn’t hear the phone. I ____ asleep. (NMET 89)  答案B关键词是didn’t，说明动作发生在过去，所以是对已经发生过的情况的推测判断。 2. --- I rang your home yesterday. A man answered but I didnt recognize the voice. ?--- On, it ___ my brother, Peter. 答案B 本句的意思是：我昨天向你家里打的电话。这是对过去情况的推测判断，应该用must have done结构 三、may