1、,情态动词,熟读深思,Lucy is an outgoing lady. She can1 play many kinds of musical instruments. Actually, she could2play the piano when she was 8 years old. Lucy also keeps taking exercise every day. She says that she has to3 do some sports because she must4 keep slim. “You shall5 get fat soon if you dont tak
2、e exercise every day.” She usually says to her friends. As for her, an elegant lady should6 try to keep fit. However, last week, she found that she might7 put on weight and she was worried and decided to lose weight.,And these days she is always thinking that she may8 succeed soon if she tries all h
3、er best. However, she is always lack of time because she ought to9 take care of her children. One night after supper, she walked quickly in order to go dancing at the Tomorrow Park and she was late. On her way, she thought that the dancing must have begun10, and the coach could have taught or shown1
4、1 many new moves.,She was afraid that her friends might have left 12 before she got there. She was regretful then.,She should have had13 supper earlier, or she could have taken a taxi14, and indeed she neednt have taken15 a bath in advance. When she reached the park finally, she found nobody was the
5、re. She remembered suddenly that it had been reported on the radio that there would be a heavy rain that night.,汉语译文：露西是一个性格外向的女士。她能够演奏许多种乐器。事实上，她8岁的时候，就能弹奏钢琴了。露西每天都要坚持运动。她说她每天都必须做一些运动，因为她得保持苗条。她经常对她的朋友们说：“如果你不每天坚持运动的话，你一定会很快变胖的。”,对她来说，一位优雅的女士应该尽量保持健康苗条。然而，上星期她发现她可能胖了,她很担忧，于是决定要减肥。这些天，她总是在想，如果自己尽力减肥
6、的话，也许很快就能成功。不过，她总是缺少时间，因为她要好好照顾她的孩子们。,一天晚上，她吃过晚饭后，就急匆匆地步行前往明天公园跳舞。她迟到了。她一路上都在胡思乱想：跳舞一定已经开始了，教练可能已经教了或者是展示了许多新动作；恐怕在她到达之前，连她的朋友都已经离开了。她很懊悔，自己本应该要早点吃晚饭的，或者本来可以乘出租车去的，甚至不必要提前就洗澡的。当她最终到达公园的时候，她发现，那儿一个人也没有。她突然想起来，电台上已经预报过说那晚可能会有一场大雨。,1. can在此表示能力。2. could在此表示能力，是can的一般过去时。3. have to表示“不得不”，强调客观需要。4. must
7、表示“必须”，强调主观想法。5. shall表示说话者的意图、允诺、告诫、警告等，用于陈述句的第二、第三人称时。6. should表示劝告或建议，意为“应该”。7. might在此是may的过去式，表示“可能”。8. may表示“可能 ”。,熟读深思,9. ought to“应该”，表示义务或责任，比should语气重。10. must have done表示对过去已经发生的事进行推测，意为“想必已经做了某事”。11. could have done表示对过去情况的推测，意为“可能已经做了某事”。 12. might have done表示“或许已经做了某事”。13. should have
8、done表示“本应该做某事(但没有做)”，有责备和懊悔之意。14. could have done意为“本来可以做某事(但没有做)”, 有懊悔之意。15. neednt have done表示做了本来不必去做的事情，意为“本不必做某事(但却做了)。,情态动词与高考,语法填空的纯空格题中或给词填空的谓语动词都可能考情态动词。短文改错可能考查情态动词。,除“知识网络”所含内容外，还须掌握以下内容：1.情态动词具有以下三个特点： 后面接动词原形。 没有人称和数的变化。 变为疑问句或否定句时不需要加助动词，而是将情态动词移至主语前变为疑问句；在情态动词后加not，构成否定句。2.表示能力，can与be
9、 able to 一般可互换，但be able to可用于将来时和完成时等更多时态；在表示过去具体某次能够成功做成某事时，只能用was/were able to。,3.表示请求许可，可说May/Might/Can/Could I？但表示给予许可时，不能用might/could，即不说you might/could。 4.must强调主观认为“必须” 做某事，只有一般现在时态；而have to 强调客观上要求“不得不” 做某事，有更多的时态变化；mustnt“不准”，而dont have to =neednt“不必”。5.表示“应该，应当”，should和ought to可互换，只是ought
10、to的语气稍重；should强调主观看法，而ought to强调客观要求。,6.表示推测的情态动词，若按语气强弱排列，依次有must， can， could， may， might等。其中，could， might不一定是can， may的过去式，只是语气分别比can， may更弱。使用时注意以下几点： must 只用于肯定句，表示有把握的推测，可译作“一定会，准会”。, can一般不用于肯定句，可译作“可能”；但语气稍弱的could可用于肯定句；can表示“有时也会” 时也可用于肯定句。 may不用于疑问句，表示没有把握的推测，常译作“或许，可能”。 用于否定句：cant， couldnt不
11、可能；may/might not可能不。,灵活运用,1. I _worry about my weekendI always have my plans ready before it comes.,意为“不必”。句意为：我不必担心我的周末我总是周末之前就把计划安排好了。,neednt,2. Just be patient. You _expect the world to change so soon.表示能力，cant不能。3. May I take this book out of the reading room？ No，you _.You read it in here.表示禁止，“
12、一定不，不准许”。,cant,mustnt,4. You _park here! Its an emergency exit.由Its an emergency exit可知, “不准”在此停车。5. I cant leave. She told me that I _ stay here until she comes back.表示“必须”，句意为：我不能离开，她告诉我必须在这等到她回来。,mustnt,must,6. I dont really like James. Why did you invite him？ Dont worry. He _not come. He said he
13、 wasnt certain what his plans were.,在此表推测，意为“可能”，否定式may/ might not的意思是“可能不”。,may/might,7. It _have been Tom that parked the car here, as he is the only one with a car.由as he is the only one with a car可知，“一定是”Tom了。8. The traffic is heavy this day; I _ arrive a bit late, so could you save me a place？表
14、“可能”“也许”。句意为：这天道路很堵，我可能会迟到一会儿，你能帮我留个座位吗？,must,might,9. It is usually warm in my hometown in March，but it _be rather cold sometimes.表示“有时会”。 10. She _ have left school, for her bike is still here.表示“不可能已经离开学校了”。,can,cant,二、单句改错,1. I used to living in Hunan but now I live in Guangzhou.living live 因为表示
15、“过去做某事”的used to后要接动词原形。2. She could sang very well when she was a girl.sang sing 在情态动词后要接动词原形。,3. Youd better to wear rubbers, for its raining outside.去掉to 由had better do sth. (最好做某事)可知。4. I would rather to work than play.去掉to 因would rather do sth. (宁愿做某事)。,5. I asked him whether he needs go there.n
16、eeds need 情态动词没有人称和数的变化。6. Something is wrong with my computer and it need repairing.need needs 因need作情态动词，仅用于疑问句、否定句或与whether连用，在肯定句中只能用作行为动词。本句是肯定句，need是行为动词，主语是第三人称单数，一般现在时，要加s，故改为needs。,7. I can have lent you the money. Why didnt you ask me?can could 由后句“你为什么不问我(借)呢？”可知前句意为“我本来可以借这笔钱给你的。”表示“本来可以
17、做某事但事实上却没有做”用could have done。而can have done 表示“可能已经做了某事”，这种情况也可以用could have done。8. She should able to give us a good answer.在able前加be 情态动词should后要接动词原形,而able是形容词，因此要加be，构成be able to。,9. Judging from what you say, he ought succeed.在ought后加to 因为ought to (=should应该)总是一起使用的，或者说ought后总是接to do的。10. You mustnt have told him the news; he knew it already.mustnt neednt 本句意为“你本来不必要告诉他这条消息的，因为他早就知道了。”表示“不必”用neednt，而mustnt意为“千万不，不允许”。,
