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1、Unit 1 Festivals around the world,Learning about language,Checking answer I (2m)Answer keys for Ex.1 on Page 4:,Checking answer II (2m) Answer keys for Ex.2 on Page 4:,Many people think that Christmas is a western _ , but in fact it is really a worldwide holiday. Christmas actually started as a _ fe
2、stival celebrated by _ around the world. Its _ is around the 3rd or 4th century AD when the _ of remember-ing Jesus birth on December 25th first started. Today, of course, many people celebrate Chris-tmas _ it were just a holiday to_ family, rather than a holiday about a _,celebration,religious,Chri
3、stians,origin,custom,as though,have fun with,belief,Checking answer III ( 2m ) Answer keys for Ex.3 on Page 4:,look forward to 2. starving 3. custom 4. Gather 5. Admire 6. Belief 7. harvests, harvests 8. feast 9. tricks 10. gain, gain,Grammar,情态动词,modal verb,情态动词有一定的意义，但没有人称和数的变化，不能独立使用，它和后面的动词构成谓语只
4、作情态动词的 can/could, may/might, ought to， must 可情态可实义的 need, dare/dared 可情态可助动词的 shall/should, will/would 相当于情态动词的 have to, used to,Must , can/could, may/might 的用法,must,1.Must 表示推测时， 只能用于肯定句。,这个电脑肯定出了问题。,There must be something wrong with the computer.,你努力学了一整天， 一定累了吧,You have worked hard all day. You
5、must be tired.,2.Must +be doing/do 表示对现在的动作进行肯定推测,他现在一定在看小说,He must be reading novels now.,他们买了一辆新车。 他们一定很有钱,They have bought a new car. They must have a lot of money.,3. Must +have done 表示对过去发生的事情作出的肯定 判断,他们在玩篮球， 他们一定完成了作业。,They are playing basketball, they must have finished their homework.,路是湿的。昨
6、天晚上一定下雨了。,The road is wet. It must have rained last night.,can/could,can /could 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 cant be Mary. She has fallen ill.,她不可能在说谎。,She couldnt be telling lies.,2. can/could have done 对过去发生行为的可能性进行推测:,刚才我还看见他了， 所以他不可能出国的。,
7、I saw him just now so he couldnt have gone abroad.,门是锁着的， 所以她不可能在家。,The door was locked.,She couldnt have been at home.,3. can/could have done “本可以，本来可能已经”用于肯定句中，表示对过去发生的事情做出的判断，,你本来可以考的更好。,You could have had a better mark.,may/might,1.May/might表示推测时，只能用于陈述句，表示对现在或将来要发生的动作把握不大。,她们明天可能会到这里来。,They may
8、 come here tomorrow.,他们可能还在等我们呢。,They may be still waiting for us.,2.might 可用于指过去的行为或者表示可能性更小。,他也许在作功课吧。,He might be doing his homework now.,我问他我是否可以离开。,I asked him if I might leave.,I asked him “May I leave now?”,3.might/may have done,表示对过去发生的动作进行可能性推测，,他可能去医务室了。,He may have gone to the clinic.,他可能
9、已经从报纸上知道这个消息了。,He might have read about the news in thenewspaper.,Will /Would you do? 表请求 表意志，愿望，决心 would表过去反复发生得动作或某种倾向“总是,总要” used to表过去常常（现在已没有这种习惯）“过去常常” used to 可于状态动词连用 would不可以 eg. He used to be a quiet boy. ( ) He would be a quiet boy. ( ),will/would,1. - Will you go skating with me this win
10、ter vacation?- It _ . A. all depended B. all depends C. is all depended D. is all depending,解析：答案B。It all depends 是“不确定”、“看情况”的意思。,练习,B,2. I failed in the final examination last term and only then _ the importance of studies. A. I realized B. I had realized C. had I realized D. did I realize,解析：答案为D
11、. 句首为“only + 副词”时，句子要用部分倒装语序；根据语境应为一般过去时态。,D,3. - I would never come to this restaurant again. The food is terrible! - _ . A. Nor am I B. Neither would I C. Same with me D. So do I,答案B。第一个句子使用了would, 用neither表示附和的意义时，助动词应与上文一致。,B,When you are very sure of something, you use must in positive sentence
12、s and cannot or cant in negative sentences.,e.g. You must be Jeanne. Im Mathilde Loisel. Weused to know each other very well.,It cant be true! I dont believe it.,When you are quite sure about something, you use can.,e.g. Attending a ball can be exciting.,Practice 1,When you think that something is p
13、ossible, but you are not very sure, you use could, may or might.,e.g.You could borrow some jewellery from your friend Jeanne, who is married to a rich man.,You may not know that the necklace I returned is not the one that I had borrowed.,Dont you have a friend who might lend you some jewellery?,Prac
14、tice 2:表示推测情态动词的重要用法.,1. You must be Mr Smith-I was told to expect you here. 2. He must have known what we wanted. 3. We may have read the same report. 4. He cant have slept through all that noise. 5. Theres someone outside-who can it be? 6. What can they be doing? 7. These pills might help to cure
15、your disease. 8. You could be right, I suppose.,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,may, 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,1. I dont know where she is, she _ be in Wuhan.2. At this moment, our teacher _our exam papers.这时，我们老师想必在批改试卷。3. The road is wet. It _ last night.(rain)4. Your mother _ for you.你妈妈一定一直在找你。,
