情态动词用法

情态动词用法 情态动词用法总结 1. should have done “本应该做----”或“竟然已经----”。 E.g. I should have arranged for the plan better. To our surprise, Jenny, who is the top student, should have 现把情态动词的自己总结心得放在这里，有需要者，请自己 passed the 动手;有批注者，请留下墨宝～ finial exam. 情态动词Modal Auxiliary 情态动词: 2. must have done“一定已经----”的否定形式为can't 可 表 关于同志近三年现实表现材料材料类招标技术评分表图表与交易pdf视力表打印pdf用图表说话 pdf 达建议、要求、可能和意愿等。情态动词没有人称和数have done/couldn't 的变化。 have done，也就是说英语中不存在mustn't have done结构。 E.g. He can’t have attended the meeting, because I didn’t see 情态动词的构成: him at that can, could, must, need, may, might, will, would, shall, should, time. would rather, 3. would rather have done 的否定形式为would rather had better, dare, used to, (have to, be able to) not have done。也就是不存在wouldn't rather have done。 E.g. I would rather not have said those words. 情态动词的用法: 4. needn't have done “本不必做----实际上做了”，而1. 情态动词 + do didn't have to “不必做---，实际上也没有做”。 2. 情态动词 + have done E.g. You needn’t have done all those calculations! We have a 3. 情态动词 + be doing computer to do that sort of thing. 情态动词 + do的特殊用法: You didn’t have to come here because of the bad 1. will可以表示“愿意”，此时可以用在条件从句中;weather. will用于二、三人称表示习惯或现在经常性的动作。 5. may/might have done 可以表示责备语气。 E.g. If you will listen to me, I’ll give you some advice. E.g. Don’t do that again. You might have hurt her. You will sit here for hours saying nothing. 6. 情态动词 + have done的反意疑问句的形式:若句2. would可以表示过去经常性的动作。 子中有明显的时间状语，则用一般过去时(was/were/did)来反E.g. When he was there, he would go to that coffee shop at the 意疑问;若句子中没有明显的时间状语,则用完成式(have/has)corner after work every day. 来反意疑问。 3. shall用于二、三人称的陈述句表示命令;用于二、E.g. Tom muse have been at home yesterday, wasn’t he? 三人称的一般疑问句中表示请求。 Tom must have been at home, hasn’t he? E.g. A so called Smith wants to see you. Shall he wait for you 7. 情态动词 + have done的省略形式为:情态动词 + inside? have，其原因是have 要体现出是完成式。 4. should可以表示“按道理来说”的含义。也可以表E.g. ---I remembered handing out the paper. 示一种惊讶语气，此时可以翻译成“竟然”。 ---You needn’t have. It was no use at all. E.g. You can’t imagine that a well-behaved gentleman should be so rude to a lady. 情态动词的注意要点: E.g. ---When I come for the photos? I need them tomorrow 1. 情态动词 + have done中，这一结构都是表示一afternoon. 般过去的时态(除了will/shall have done表示将来完成时)。 ---They should be ready by 12:00. 情态动词+do也可以表示过去时态，但没有情态动词+have 5. would rather与had better的否定形式分别为would done过去的概念强。 rather not和had better not。 2. 情态动词可能性排序:must, will(would)/ shallE.g. You had better not break the rules, or you will be punished. (should) can, 6. need和dare既可以做情态动词使用(后+do)，也 could, may, might。 可以做实义动词使用(后+to do)。 3. can和be able to的区别:can往往只用于现在和当sth/sb + need/want/require/demand后+doing/to be done(此 过去两种时态，而be 时的人往往为“老、弱，病、残、幼、囚)。 able to可以用于各种时态。另外be able to还可以指经过努力 I dare say that----- 为固定句型。 而取得成功的某一次具体的动作。 E.g. The flowers need watering. E.g. The fire spread quickly, but everyone was able to get out. 7. used to的否定形式有两种:usedn't to 和didn't use 4. must强调主观原因;have to强调客观原因。 to。反义疑问句也有两种usedn’t和didn’t。 E.g. When you are faced with trouble, you must keep calm. 8. must的否定形根据不同的含义式有三种:can't, We have to adjust ourselves to the changing situation. needn't，mustn't，含义分别为“不可能”，“不必”，“不应该”。 5. can have done表推测时多用于疑问句或否定句E.g. He can’t tell lies according to what he said. 中，不用于肯定句， 9. 对would和could一般疑问句的回答必须用will和could have done 用于肯定句中表示“本来可以完成而未完成can。 的动作”。 E.g. ---Could I use your phone? My phone is out of order. E.g. He can't / couldn't have forgotten you address so soon. ---Yes, you can. We could have walked to the station; it was so near. 10. can't help doing和could not but do表示“禁不住”。 E.g. When they heard the exciting news, they couldn’t help jumping. 11. can not help but do表示“不可能不做某事”。 E.g. I can not help but notice the scar on his face. 情态动词，have done的特殊用法: