语法情态动词完整版.ppt

1) can的主要用法是： ? A.? ___________： ? eg. The girl can dance very well. He can speak several languages. B.? _____________： eg. Can the news be true? It can’t be true. 2) could的主要用法是： A. ______________________________ ____________________: eg. Father said I could go out with my friends. We all knew that the young man couldn’t be a doctor. 补充：Can 还可以表示常有的行为或情形，“有时会，时而可能”，常与 at times, sometimes连用。 1.Peter _______ be really difficult at times even though he is a nice person in general. A shall B should C can D must 2.Sometimes he is very friendly; at other times he _______ be very moody. A can B must C will D shall (2011.四川-20) The police still haven’t found the lost child, but they’re doing all they______. A. can B. may C. must D. should (2011.江西-32) It ____ be the postman at the door. It’s only six o’clock. A. mustn’t B. can’t C.won’t D. needn’t 3) can (could) 与 be able to 的区别 （1）can 只有现在时和过去时，而 be able to 则有各种时态。 （2）can 一般指自身具有的能力，而be able to 则表示经过一段时间的努力后所具有的能力，相当于manage to do 或 succeed in doing . may 和might ： may 常用来表示： ?A. _________________________ ?? eg. May I come in ? Yes, please./No, you mustn’t . B. ________________________ C. _____________________ eg. May you succeed! May you have a good journey! (2010.四川-3) --_____ I take the book out? -- I’m afraid not. A. Will B. May C. Must D. Need Some people who don’t like to talk much are not necessary shy; they ____ just be quiet people. A. must B. may C. should D. would will和would： I will tell you something important 2. _______________________________ Will you tell her that Im here? 3. ______________________________ The door won’t open. 门打不开。 Fish will die without water.