1、单元语法专练,情态动词can的用法 1.定义: 情态动词can本身有一定的含义,但不能单独作谓语动词,必须和动词原形连用。can本身没有人称和数的变化。 2.基本用法: ( 1 )表示能力( 如体力和脑力方面 ),意为“能;会”等。例如: Can you play the piano?你会弹钢琴吗? Jim can swim but I cant.吉姆会游泳,但我不会。 ( 2 )表示猜测,常用于否定句或疑问句中,指某种可能性。例如: Han Mei cant be in the classroom.韩梅不可能在教室里。 Can he come here today?他今天能到这里来吗?,(
2、3 )表示请求或允许,意为“可以”,常用于口语中,此时与may同义。例如: Can I have a cup of tea,please?请问我可以喝一杯茶吗? You can go out.你可以出去了。 注意:could也可表示请求,但比can的语气更委婉。,3.基本句式: ( 1 )肯定句:主语+can+动词原形+其他。例如: He can help you.他能帮助你。 You can go to play games.你可以去玩游戏了。 ( 2 )否定句:主语+cant+动词原形+其他。例如: Lucy cant play the piano.露西不会弹钢琴。 We cant do
3、it like that.我们不能像那样做。 ( 3 )一般疑问句:Can+主语+动词原形+其他? 肯定回答:Yes,主语+can。 否定回答:No,主语+cant。例如: Can you dance?你会跳舞吗? Yes,I can./No,I cant.是的,我会。/不,我不会。,.单项填空 ( C )1.Li Hua cant in the classroom,because he is at home now. A.is B.are C.be D.am ( B )2.Can you play chess? No,I . A.may not B.cant C.mustnt D.can (
4、 A )3.The work is too hard for him.He finish it at once. A.cant B.shouldnt C.can D.should ( B )4.She sing and dance. A.is B.can C.are D.be,( C )5.Can you and Cindy swim? Yes,we . A.cant B.are C.can D.arent ( A )6.What can they ? A.do B.does C.did D.doing ( D )7.My brother can an English song. A.sing
5、s B.be sing C.to sing D.sing ( A )8.Can I use your bike? .Here you are. A.Sure B.No C.Thanks D.Sorry,( B )9.Its surprising that Mr.Lees little daughter speak English so well. A.must B.can C.mustnt D.cant ( D )10.Can you draw? No,I . A.am not B.dont C.can D.cant,.按要求完成句子,每空一词 1.Can you play basketball?( 作肯定回答 ) Yes ,I can . 2.Can he play the guitar?( 作否定回答 ) No ,he cant . 3.He can speak English.( 改为一般疑问句 )Can he speak English? 4.She can do kung fu.( 改为否定句 ) She cant do kung fu. 5.We can play football after school.( 对画线部分提问 ) What can you do after school?,
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