《“情态动词have过去分词”句型的用法》由会员分享，可在线阅读，更多相关《“情态动词have过去分词”句型的用法（2页珍藏版）》请在金锄头文库上搜索。
1、“情态动词 +have+过去分词”句型的用法1.“must+have+过去分词”用于肯定句中，表示对过去所发生的动作或存在的状态很有把握的一种推测，也可以用来表示对到目前为止的情况的推测，意为“一定（已经），想必” 。在使用这一句型时，需要注意的是：(1) “must+have+过去分词” 句型的否定形式不能用 “mustnt+have+过去分词” ，而要用“cant (couldnt)+have+过去分词”结构，表示“过去不可能做了什么” ，语气也比较肯定，而 mustnt 则表示“绝对禁止” 。(2) “must+have+过去分词” 句型的疑问形式是用 can (could)构成“Can
2、 (Could) sb.have done?”结构。例 1. Tom graduated from college at a very young age. Oh, he have been a very smart boy then.A. could B. should C. might D. must例 2. He have completed his work, otherwise, he wouldnt be enjoying himself by the seaside.A. should B. must C. wouldnt D. cant2. “could （couldnt ）+
3、have+过去分词”表示对过去情况的较有把握的肯定或否定推测。“could+have+过去分词”说明过去可以做或能够做，但实际上没有做，意为“本来可 以” 。而“cant+have+过去分词”表示一种非常有把握的否定推测。例 1. My English-Chinese dictionary has disappeared. Who have taken it?A. should B. must C. could D. would例 2. I stayed at a hotel while in New York. Oh, did you? You with Barbara.A. could h
4、ave stayed B. could stay C. would stay D. must have stayed3. “may (might) +have+过去分词”表示（过去）可能做了某事，意为“也许已经，可能已经” ，突出可能性。这种结构常用于肯定句或否定句中，不能构成疑问句式，其疑问句式常用“can (could) +have+过去分词”结构。例 1. Sorry, Im late, I have turned off the alarm clock and gone back to sleep again.A. might B. should C. can D. will例 2.
5、Yesterday, Jane walked away from the discussion. Otherwise, she something she would regret later.A. had said B. said C. might say D. might have said4. “should (ought to) +have+过去分词”用于肯定句表示“过去本应该做但实际上没有做” ，意思为“本来应该的（但实际上却没有） ”，含有“责备”的意思；其否定形式要在 should 或 ought to 后加 not， 构成“shouldnt (oughtnt to) +have
6、+过去分词”结构，表示“过去本不应该做而实际做了某事” ，含有“责备、抱怨、后悔”之意。例如：例 1. I was really anxious about you. You home a without a word.A. mustnt leave B. shouldnt have left C. couldnt have left D.neednt leave例 2. Oh, Im not feeling well in the stomach. I so much fried just now.A. shouldnt eat B. mustnt have eaten C. shouldn
7、t have eaten D. mustnt eaten例 3. Mr. White at 8:30 for the meeting, but he didnt show up.A. should have arrived B. should arrive C. should have had arrived D.should be arriving例 4. Ill tell Mary her new job tomorrow. You her last week.A. ought to tell B. would have told C. must tell D. should have told 5. “neednt+have+过去分词”表示“过去没有必要做某事，但实际上却做了” ，意为“本来可以不必的（可实际上却已经了） ”。例如：There was plenty of time. She .A. mustnt have hurried B.couldnt have hurriedC. must not hurry D. neednt have hurried再如：You neednt have woken him up at 5 o clock. Its too early.其实不必五点钟叫他，太早了。
