《人教版高中英语必修三Unit 2《healthy eating》(Grammar)课件》由会员分享，可在线阅读，更多相关《人教版高中英语必修三Unit 2《healthy eating》(Grammar)课件（43页珍藏版）》请在金锄头文库上搜索。
1、Period 4 Grammar Modal Verbs,Unit 2 Healthy Eating,The first wealth is health . 健康是人生第一财富。 A light heart lives long. 豁达者长寿。 Early to bed and early to rise makes a man healthy , wealthy and wise. 早睡早起会使人健康、富有和聪明。 Without health no pleasure can be tasted by man. 没有健康就没有乐趣。 Good health is over wealth.
2、健康是最大的财富。,Proverbs,What should/shouldnt we do to keep healthy?,Good health is over wealth.,If youd like to give advice or opinions, you can use should/ ought to/ had better do,What ought we to do to keep healthy?,Good habits can help us to keep healthy and bad ones can cause diseases. There is a ser
3、ious disease called H1N1 flu these days. It spreads easily among people in spring and autumn. The flu is a serious disease, but we dont have to be afraid of it. We can do something to prevent it. But how?,We ought to keep the air fresh all the time. We ought to keep away from crowded places. Wed bet
4、ter drink more water every day.,You should go to school right away. Its eight oclock now. He should be at work. It seems so unfair this should happen to me. You should have reminded me of the meeting. What should we do now?,sum up,义务,表惊讶：竟然,推测,用于第一人称疑问句，询问对方的意愿,表责备，谴责,What kind of food must we eat t
5、o be strong?,Good health is over wealth.,must / have to,Must I finish the task right now?,Yes, you must/ you have to. No, you neednt / you dont have to.,She called me yesterday evening but I didnt hear it.,I _ (be) asleep.,must have been,1. -Will you stay for lunch? -Sorry, _. My brother is coming t
6、o see me. A. I mustnt B. I cant C. I neednt D. I wont 2. -May I pick a flower in the garden? - _. A. No, you neednt B. Not, please. C. No, you mustnt D. No, you wont. 3. You _ return the book now. You can keep it till next week if you like. A. cant B. mustnt C. neednt D. may not 4. John, you _ play
7、with the knife, you _ hurt yourself. A. wont ; cant B. mustnt ; may C. shouldnt ; must D. cant ; shouldnt,C,B,B,C,mustnt neednt shouldnt cant,不准, 禁止,没必要 ( = dont have to ),不应该 ( = ought not to ),不能，不可能,Could you use them to make sentences?,What modal verbs have you learned? can/could may/ might will
8、/ would shall/ should had better must have to need ought to dare,*can / could 只能表示现在或过去的能力 * be able to 能用于各种时态 相当于manage to do sth. / succeed in doing sth.,1. 表示“能力”的情态动词的用法,He _ go to the party yesterday evening in spite of the heavy rain. 2. Although he _swim, he _ cross the river.,was able to,ca
9、nt,was able to,2. 表示“许可”的情态动词,1. -_ I go out to play, mum? -No, you_. You should do your homework first. A. Might; wouldnt B. Can; neednt C. Can; cant D. Need; mustnt 2. - Could I call you by your first name? - Yes, you_. A. will B. could C. can D. might,3. 表示“请求”的情态动词的用法,* 均可表示将来。 过去时为 should, woul
10、d.,* will, would 可表示意愿、常出现的动作。 在疑问句中表示请求和建议.,4.表示“推测，可能性”的情态动词,can 表示推测时，只能用在否定句或疑问句中。,Its so late. Can Tom be reading?,这么晚了，汤姆还在看书吗？,这个人不可能是玛丽， 她生病了。,It couldnt be Mary. She had fallen ill.,情态动词能表示时态吗？,1. 表示对现在的推测 2. 表示对过去的推测 3.表示对将来的推测,表示推测情态动词的重要用法,肯定的推测 可能的推测 否定的推测 疑问的推测,must,对将来 对现在 对过去,情态动词,ma
11、y, might,cant, couldnt,can, could,+ V. + V. + have done 常见must be + be doing,+ V. + V. + have done + be doing 可以用not表示“可能不”,+V. + V. + have done + be doing,+ V. + V. + have done + be doing,You look tired. You _ go to bed now.,should,You _ believe everything you read on the Internet.,shouldnt/cant,My
12、 mother cooked a lot of food for me. She has been cooking all the morning.,She must be tired now.,I have just eaten a lot of food for lunch.,You cant be hungry now.,My house is near the railway.,It _ be noisy there.,must,The old restaurant _ be very good. Its always full of people.,The new restauran
13、t _ be very good. Its always empty.,must,cant,Where is Jane?,Perhaps she is reading newspapers.,=She _ (read) newspaper.,may be reading,In China, many children _ wear uniform when they go to school.,have to,Dont tell anybody what I said. You _ keep it a secret.,must,The floor is clean. You _ sweep i
14、t.,neednt,The floor is clean. You _ swept it.,must have,I promised I would be on time. I _ be late.,couldnt,Last night Paul became ill suddenly. We _ call the doctor.,had to,We cant repair the car ourselves. We _ take it to a garage.,have to,I can manage the shopping alone. You _ come with me.,needn
15、t,That is an important book. You _ keep it well.,must,Excuse me, _ you tell me the way to the railway station, please?,could,You are carrying a lot of things. You cant open the door yourself. Theres a man standing near the door. You say to him:,_ you open the door, please?,Could,_ you like a cup of coffee?,Would,1. By lunchtime they would all be sold. 2. His restaurant ought to be full of people. 3. What could have happen
