1、山东省泰安市肥城市第三高中英语 Unit 2 Healthy eating情态动词语法学案 新人教版必修3教学内容Learning aims: 1 知识与能力：To master some sentence patterns2 过程与方法：To msater the usage of Grammar情态动词3 情感态度与价值观：Try to pay your attention to the class!Learning key points: To master some sentence patterns.Learning difficult points: To master the u
2、sage of Grammar情态动词【学案使用说明】在提前预习的前提下完成学习指导即时感悟【回顾复习】Check the home work (have a dictation of the language points)【自主 合作探究】1. have tohave to 表示客观需要去做的事情，意为“必须，不得不。”e.g. I have to get the station early to catch the first train. We missed the bus so we had to walk home.have to 有多种时态。常见的有:一般将来时 We will
3、have to gather at the school gate at 7 tomorrow.一般现在时 I have to take more money with me because my wife has so much to buy.一般过去时 Finally, we had to give up our idea to hold a picnic outside as it rained for a whole afternoon.2.dare & needNeed I do ? Yes, you must. No, you neednt. 情态动词实义动词dare.否，疑，条
4、dare not do否,疑dont dare to do dont dare do不用于肯定句肯：dare to do need否，疑 neednt do (dont) need sth (dont) need to do肯：must, have to, ought to, should注意对need问句的回答:-Need I finish the work today? -Yes, _. No, _. No, _.neednt 对其它情态动词的回答: -Shall I tell John about it? -No, you _ -Must we do it now? -No, you _
5、. Could I borrow your dictionary?(委婉) - Yes，you can/may. Sure. Go ahead. Please yourself.May I take this seat?(第一人称疑问句) Yes, you may. No, you mustnt.3. must +have done 表示对过去已经发生的行为进行推测，意为“想必/准是/一定作了某事”。It must have rained last night, for the road was very muddy. 昨晚 一定是下雨了， 因为地上很泥泞。We must have learn
6、ed 2,000 words by the end of last term. 到上学期为止我们一定学了有两千个单词 。4. can/could+have done表示对过去的行为的怀疑和不肯定，通常用在否定句和疑问句中。 Can they have won the basketball match?他们可能赢了篮球赛吗？ It couldnt have been Mr. Green. He has gone to New York. 那不可能是格林先生的，他已经去北京了。5. may/might+have done表示对过去已发生行为的推测，意为“也许/或许已经”。一般只用于肯定句和否定句中
7、，不用与疑问句。might比may更委婉、含蓄和不肯定。 Its too late. I think he may have gone to bed.太晚了，我想他可能已经睡觉了。 He may/might not have finished the work.他可能没有完成工作。6. could(不用can)+have done,在肯定句中表示“本来能够而没能”，具有婉转的批评和责备之意。 I could have passed my exam easily, but I made too many stupid mistakes. 我本来能够轻易通过考试，但我犯了太多不该 犯的错误。You
8、 could have reported to me earlier. 你本该早点告诉我的。7. should/ought to+have done用于肯定句时，表示“本该做某事而实际上没做”，用于否定句时，则表示“不该做的事反而做了”。You should have told him a week ago.你本来应该在一周前告诉他的。You ought not to have taken the magazine out of the reading room.他不该、把杂志带出阅览室的。8. might（不用may）+have done表示“本来可能”，但实际上没有发生的事。另外，还可表示
9、“本来应该或可以做某事”之意，含有轻微的责备语气。You might not have told her.你本可以不告诉他的。（事实上你告诉他了） You might have come earlier.你本可以早点来的。（但没有这样）She neednt have gone to the station yesterday.昨天她本不必到火车站去的.（昨天她去了）You neednt have bought it.你本可不必买它的。 （你买了）【当堂达标】1. I thought you _like something to read, so I have brought you some
10、books. A. may B. might C. would D. must 2. Where is my pen? I _it. A. might lose B. would have lost C. should have lost D. must have lost3. I didnt hear the phone. I _asleep A. must be B. must have been C. should be D. should have been4. -There were already five people in the car, but they managed t
11、o take me as well. -It _a comfortable journey A. cant be B. shouldnt be C. mustnt have been D. couldnt have been 5. Its nearly seven oclock . Jack _be here at any moment. A. must B. need C. should D. could【反思提升】1.Oh, Im not feeling well in the stomach. I _ so much fried chicken just now.A. shouldnt
12、eat B. shouldnt have eaten C. mustnt eat D. mustnt have eaten2.-Why hasnt Jane arrived yet? -She _ again in the morning?A. shouldnt have overslept B. may have turned off the alarm clockC. must have no one t o call herD. should have someone to wake her up3.-Did you go to the movie the day before yest
13、erday? -No. We _, but we decided not to.A.should have gone B. could go C. should go D. could have gone4.As it turned out to be a small house party, we _ so formally.A. neednt dress B. didnt have to dress upC. Might not have dressed up D. neednt have dressed up5.Im rather surprised you havent reporte
14、d him to your teacher. In my opinion, you _ this as soon as you found out he was cheating.A. must have done B. might have done C. should have done D. could have done 【拓展延伸】1.-What _ it be? -It _ be a mail box, for it is moving. It _ be a car.A. can; cant; must B. can; can; must C. can; mustnt; must
15、D. must; mustnt can 2. -Isnt that Anns husband over there? -No. it _ be him-Im sure he doesnt wear glasses.A.cant B. must not C. wont D, may not3.-When can I come for the photos? I need them tomorrow afternoon. -They _ be ready by 12:00.A. can B. should C. might D. need4.-are you coming to Jeffs party? -Im not sure. I _ go to the concert instead.A. must B. would C. should D. might 本单元语法点仍是情态动词的使用