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1、Healthy Eating,period 2,Learning about Language,Warming Up,Prepare for “discovering useful words and expressions” on page 12.,Ex 1. lie 2. get away with 3. raw 4. curiosity 5. customer 6. benefit Ex 2. 2. ought to 4. diet 5. raw 8.balanced 9. energetic 10. slim become thinnerlose weight 3. being lau
2、ghed at by her friendslosing face 6. felt so sad and hopeless about herselflose heart 7. was unwilling to visit any morelose interest in visiting,Prepare for “Discovering useful structures” on page 13.,Ex 2. ought to; shouldnt; neednt; dont have to/neednt; will 2. have to; mustnt 3. ought to; should
3、,Presentation,Grammar,主要情态动词,Can, could May, might Must Ought to Need Dare, dared,can,表能力：I can read very fast. 表客观可能性：Mary cant be the leader. 表允许：You can take it away. 表怀疑：How can you finish it?,could,表能力/可能性：Could you finish it soon? 表怀疑：He could not be 50. 委婉地提出问题：Could you show me the passport?
4、 用于虚拟：If you had come, you could have got a wonderful gift.,may,询问或说明可不可以做：May I ask you a question? 表可能会发生：He may get angry. 表目的或让步的从句：Come here in time so that you may see the singer.,might,表可能的事：（同may） 表目的从句： （同may） 用于虚拟： If you had finished it, the boss might have given you some promotion.,must,
5、表必须做的事：You must hand in your homework this Friday. 表揣测：It must have rained last night. 表“偏偏”的意思：He must get a fever when we were ready to get off.,ought to,表应该做的事：You ought to do it carefully. 表非常可能的事：He ought to be here by now.,need,表需要；主要用于否定句或疑问句：We neednt hurry. 可用于否定意思的句子：I dont think you need
6、do it. 作及物动词，和不定式连用：He didnt need to say that to her.,dare,表“敢于”，主要用于疑问句、否定句和条件从句：He dare not tell him the news. 作及物动词，与不定式连用：We dont dare to enter the house.,shall用于第一，三人称疑问句， 征求意见或请求 shall 第二，三人称陈述句, 命令,警告,允诺,威胁 should 表劝告，建议，命令，顺理成章 ought to 表应该，语气should 美语中，ought to用于否，疑句时to 可省。 多数情况下，ought to可与
7、should互换使用。 疑问句中常用should代替ought to。 Ought to的反意疑问句用shouldnt替代。 Ought to表示“想必会”时语气较must 弱。,shall , should &ought to,你最好不要抽烟了。 You should/ ought to stop smoking.,You ought to have helped him with his English, _ ? wont you B. ought not you C. shouldnt you D. wouldnt you,他们想必已到那儿了。 They ought to be ther
8、e by now. (语气较must 弱),比较had better, should & ought to,三者均表示建议，意为“应该”，“应当”或“最好做”. 三者的语气程度为渐强。 had better指一般性的建议，最弱。 should&ought to含义相近，常可互换。区别在于，ought to常指特殊情况下的“应当”。Should则指一般情况。见例句。,You ought to help him because he is in trouble now.(语气强，有命令意味。) You should have a rest after finishing your sports.（
9、一般性建议）,have to,have to 表示客观需要去做的事情，意为“必须，不得不。” I have to get the station early to catch the first train. We missed the bus so we had to walk home. We have to overcome all kinds of difficulties.,Have to 有多种时态。常见的有： 一般将来时 We will have to gather at the school gate at 7 tomorrow. 一般现在时 I have to take mo
10、re money with me because my girlfriend 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.,have to （考点）,Must they do? Yes, they must. No, they neednt/dont have to.,must & have to,must表主观意志，而have to表由于客观因素不得不做完成的事情。 Must没有过去式，除在间接
11、引语中可表示过去的时间。在直接引语中表示过去的时间用had to代替。 I told her that she must give up smoking. She said, “We had to get everything ready that night.”,比较must & have to,Need I do ? Yes, you must. No, you neednt.,dare & need,注意对need问句的回答: -Need I finish the work today? -Yes, _. No, _. No, _.,you must,you neednt,you don
12、t have to,neednt 对其它情态动词的回答: -Shall I tell John about it? -No, you _. -No, you _.,-Must we do it now? -No, you _. -No, you _.,neednt,dont have to,neednt,dont have to,Exercises,高考链接 1.-Is John coming by train? -He should, but he _ not. He likes driving his car. (高考真题） A. must B. can C. need D. may 2.
13、It has been announced that candidates(候选人) _ remain in their seats until all the papers have been collected. (高考真题） A. can B. will C. may D. shall 3.-I heard they went skiing in the mountains last winter. (高考真题） -It _ true because there was little snow there. A. may not be B. wont be C. couldnt be D
14、. mustnt be,Practice 1: 高考考题专练 1. I thought you _like something to read, so I have brought you some 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 lost 3. I didnt hear the phone. I _asleep A. must be B. must have b
15、een C. should be D. should have been,B,D,B,4. -There were already five people in the car, but they managed to 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,D,C,6. -Did the train arrive in time? -No. It _ two hours ago. A. must have arrived B. ought to have arrived C. must arrive
