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1、1.Jim _ sing very well.2.Hello,_ I speak to Jim?3.He listened,but he _ hear nothing.4.We are students.We _ work hard.5._ I come in?6.You _ talk in class.cancan?may?must?could?might?can/could/maycouldmustMaymustntThere must be some mistakes.She cant be English.Ask Jim.He may know the answer.mustcantm
2、aymustbe certain may/might/couldbe not certain;be possiblecantbe impossibleWhats this?It must be.Can it be.What kind of ball?It may/mightcould be.BALLWhats this?.might/may/could.Young?OrOld?Who can it be?It may/might/could be.Whats in the box?There may/might/could be.ChocolateWhat do they do?No.1No.
3、2No.3No.4He must be a.Policeman Postman Waiter BossWhere are they from?No.1No.2No.3No.4He/She must be from/come fromHe/She may/might be from/come fromWhat can it be?-Can it be a.-No,it cant be a I think it (Yes,maybe.)What are they going to do?No.1No.2No.3No.4He/She/They may/might/could.can和和 could1
4、表示表示“能力能力”I can swim,but my sistercant.2表示表示“许可许可”、“请求请求”Can I go with you?(请求请求)Father said I could go to cinema.(表示过去的许可表示过去的许可)You cannot smoke in the meeting room.(cannot 表示表示“禁止禁止”)Could I use your phone?Yes,of course you can.肯定回答，不能用肯定回答，不能用could，一般是，一般是Yes,please.Thanks.3“猜测猜测”（主要用于否定（主要用于否定句
5、和疑问句句和疑问句）：He cant be at home.(否否定句定句)Can the news be true?(疑问句疑问句)may 和和might1表示表示“许可许可”You may take a walk.Students may not make noise in the library.(may not 表示不许可或表示不许可或禁止禁止)May I come in?否定回答否定回答No,you mustnt./cannot.也可以也可以 may not 肯定回答肯定回答sure,certainly,of course Might I trouble you for a ligh
6、t?You may indeed.2.表示表示事实上的可能性事实上的可能性 It may rain tomorrow.(表示可能会发生表示可能会发生)1.表示表示“必须必须”、“务必务必”：We must obey orders.Must I pay now?肯定回答肯定回答 Yes,you must 否定回答否定回答 No,you neednt 或或 No,you dont have to2.表示表示“预测预测”(必定，必会必定，必会)一般用于一般用于肯定肯定句。可用于否定一般疑问句。句。可用于否定一般疑问句。There must be a mistake.Mustnt there be a
7、nother reason for his behavior?mustmustmay/might/couldcant/couldntdobe doinghave doneWhat are they doing?must.What is Ms Wang doing now?The ground is wet.What happened lastnight?It must have rained last night.How did Tom reach the cake?He must have used a chair.What is the house for?Where are they?Homework:Finish Ex in your exercise book.Finish Ex.in your workbook.