情態(tài)動詞havedone的用法-閱讀頁
2024-08-23 00:29本頁面
【正文】 A. mayn’t B. can’t C. mustn’t D. needn’t [解析] He needn39。[注意] He didn39。3．must have＋過去分詞用于肯定句，表示“過去一定做過某事”，表示一種很有把握的推測。I have lost one of my gloves. I ________ it somewhere . （05’北京春季）A. must drop B. must have dropped C. must be dropping D. must have been dropped[解析]本題應選B。I _______have been more than six years old when the accident happened. （05’天津卷）A. shouldn39。t C. mustn39。t[解析]從題意上分析，本題的前一句陳述一個理由，后一句則是由前一句得出的結(jié)論。4．may／might have＋過去分詞表示對過去情況的一種不太有把握的可能性推測，表示“過去可能／大概已做了某事”；否定句表示“過去可能還沒有做某事”。 I stayed at a hotel while in New York . Oh, did you? You ＿＿＿＿ with Barbara． (NMET’98) A. could have stayed B. could stayC. would stay D. must have stayed Key: [A]鞏固性練習：從A、B、C、D中選擇最佳答案。t have taken D. mustn39?？键c之一：在虛擬條件句中，如果表示與過去事實相反的情況，從句中用過去完成時，而主句中則用“情態(tài)動詞＋現(xiàn)在完成時”，即：would/ could/ should/ might have done。 could have climbed B. were not。 could have climbed D. had not been。2. 本句是一個含蓄虛擬條件句，意思是：If you hadn’t stay at a hotel while in New York, you could have stayed with Barbara. 表達了與過去事實相反的情況，答案選A。表達了與過去事實相反的情況，故答案選D。其否定形式分別用can’t/ couldn’t和can/ could。She didn’t attend the lesson yesterday. She must have been ill.她昨天沒有上課，她一定是生病了。故答案選B。是對過去情況的推測判斷，應該用must have done結(jié)構(gòu)。
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