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1、Unit 8,Section AGrammar Focus,Review,Translate the phrases.,outside the window have fun next-door neighbor at first run away feel uneasy have no idea have fun(in)doing sth.,在窗外玩得高兴隔壁邻居最初；首先逃跑心神不安一点不知道；没办法 做某事很愉快,-Whose volleyball is this?-It must be Carlas.She loves volleyball.-Whose book is this?-I
2、t must be Marys.J.K.Rowling is her favorite writer.-Whose hair band is this?-It could be Meis.,Read the sentences below,paying attention to the colored parts.,-Whose notebook is this?-It must be Mings.It has her name on it.-Whose French book is this?-It could be Carols.She studies French.-Whose guit
3、ar is this?-It might belong to Alice.She plays the guitar.-Whose T-shirt is this?-It cant be Johns.It is too small for him.,Read more sentences.,must,cant,couldmight,100%probably true,20%-80%possibly true,0almost not true,表示推测的情态动词 在英语中，表示对某件事物的确定程度，即表示推测的时候，我们通常会用到以下情态动词:must,might,could,may,cant,c
4、ouldnt。,一.can和could的区别和用法 1.can表示体力和脑力方面的能力,或根据客观条件能做某种动作的“能力”。Can you speak English？can用在否定句和疑问句中时有时表示说话人的“猜测”或“不肯定”。Can the news be true？(在日常会话中,can可代替may表示“允许”,may比较正式),2.could 是 can的过去式,表示过去有过的能力和可能性,还有怀疑和不肯定的意思(在否定和疑问句中)。She couldnt skate when she was five years old.（能力）At that time we thought
5、the story could be true.（可能性）could用来提问,是有礼貌的请求 Could.Please?语气较为婉转。Could I speak to Mr.Smith,please?,二.might和may的区别和用法:1.may的用法:a.表示”允许”或”请求”。May I come in？在使用这一用法时需注意:may表示“允许”的否定形式是must not,意思是“不应该、不许可”。May I take this book out of the reading room?No,you mustnt.,b.表示说话人的猜测，认为某一事情“或许”或“可能”发生。He may
6、 know the answer.c.may用在感叹句中可表示祝愿、愿望。May you succeed.祝你成功。May you have a pleasant journey.一路平安。,2.might的用法:a.might可以代替may,表示现在时间的动作，但语气较为婉转客气或更加不肯定。Might I offer a suggestion？b.might用来表示现在时间时,还可表示”规劝”。You might pay more attention to spoken English.,三.must与have to的区别 have to比较强调客观需要,must着重说明主观看法，另外ha
7、ve to能用于更多时态。比较下面的句子：My brother was seriously ill,so I had to call the doctor in the middle of the night.(客观上需要做这件事)He said that they must work hard.（主观上要做这件事）,有时两者都可以用,意思差别不大。We must/have to leave now.must在表示说话人对事物的推测时，它比may肯定得多,相当于汉语的“一定”或“准是”。(只有在肯定句中能这样用。)This must be your room.,在回答由must引起的问题时,如
8、果是否定的答复，不能用mustnt,而需要用neednt或dont have to,因为mustnt是“一定不要”的意思，表示禁止。-Must I hand in my homework now?-No,you neednt.,情态动词表示推测可以分为以下几种情况:情态动词+do此结构表示对现在或将来情况的推测和判断 Do you know where she is now?I think she might travel in Beijing.情态动词+be doing此结构表示对现在或将来正在进行的情况的推测和判断。At this moment,my father cant be work
9、ing in the office.,情态动词+have done此结构表示对过去情况的推测和判断。The road is wet.It must have rained last night.情态动词+have been doing此结构表示对过去正在进行的情况的推测和判断。Your mother must have been looking for you at that moment.,根据句意,从方框中选择正确的情态动词填空,每项限用一次。should,must,cant,may not,mustnt1.That _ be Lucy.She has gone to Beijing on
10、 business.2.There _ be something wrong with my watch.It isnt working now.,cant,must,3.He _ know the answer,either.Lets ask that policeman.4.You _ swim in the river.Its dangerous.5.You _ look after your parents when they become older.Its your duty.,may not,mustnt,should,用must,might,could或cant 填空The t
11、oy car _ be Jims.He is the only kid at the picnic.2.This Mp5 _ be Lindas.I know she has one.3.The mobile phone _ belong to Lucy or Lily.They both have mobile phones.4.The man _ be Mr Smith.He has gone to Shanghai and hell be back in three days.,must,could/might,could/might,cant,4a Choose the best wa
12、y to complete each sentence using the words in brackets.The keys:,might be,could be,could be,can be,could be,A:Many people are wearing coats.B:The weather must be _.2.A:Sally has been coughing a lot.B:She might be _.3.A:This restaurant is always crowded.B:The food _.4.A:Whenever I try to read this b
13、ook,I feel sleepy.B:It cant _.,4b Complete these responses.,might be,could be,could be,could be,Look at the two rooms below.Make guesses about the owner of each room.,【浙江湖州】Whos singing in the next room?It _ be her.She has gone to New York.A.cant B.must C.shouldnt D.can【解析】考查情态动词表推测。表示否定推测时，用cant，意为
14、“一定不”。must表示推测时，意为“一定”，用于肯定句；根据答语“她已经去了纽约”可知是否定推测，故选A。,中考链接,【2011湖北黄冈】41.Whose T-shirt is this?It _ be John s.Its _ small for him.A.cant;much too B.cant;too much C.mustnt;much too D.mustnt;too much【解析】情态动词的用法。根据句意“它不可能是约翰的，对他来说太小了。”故排除C、D，too much为“太多”的意思，much too为“太”。故选A。,【2013天津】Where are you goin
15、g this month?We_ go to Xiamen,but were not sure.A.neednt B.must C.might D.mustnt【解析】neednt(不必)表建议；must(一定)表猜测的可能性很大；might(可能，也许)表不是很肯定的猜测。mustnt(不允许)表命令。句意：-这个月你们将去哪？-我们或许去厦门，但还不确定。,C,【2013福建泉州】-Have you decided where to go for your summer vacation?-Not yet.We _ go to Qingdao.Its a good place for va
16、cation.A.may B.need C.must【解析】句意：-你已经决定到哪里过暑假了吗？-还没有呢，我们也许去青岛，那是个度假的好地方。情态动词表示推测时，may表“可能”，must表“一定”，cant表“不可能”。,A,【2014铜仁】Must I water the flowers now,mum?No,you _.You _ do it later.A.mustnt;must B.mustnt;may C.neednt;may D.neednt;must【2014连云港】_ I know by what time you want the project to be done?B
17、y the day after tomorrow._ you finish it on time?A.May;Can B.Must;Need C.Could;Must D.Need;Would,C,A,【2014长沙】Whos singing in the garden?It _ be Mr.Brown.He always practices singing at this time.A.must B.cant C.need【2014河北】I _ follow you.Would you please repeat it?A.cant B.mustnt C.neednt D.shouldnt,A,A,
