(完整版)can 的用法及练习 情态动词。can 的用法: 一、简介 1、结构:can + 动词原形,没有人称和数的变化。 2、否定形式:cannot/can’ t, cannot比缩略形式can' t要正式。口语中一般用缩略形式. 例如:I can swim. Daming can ride a bike. He can’t drive a car。 二、用法 1、 表示能力(体力、知识、技能等),此时可用be able to代替。 例如:Mary can speak three languages. 玛丽会说三种语言。 = Mary is able to speak three languages。 注意:(1)can只有一般现在时和一般过去式;而be able to则有更多的时态。 例如:I'll not be able to come this afternoon。 今天下午我将会来。 (2)当表示“经过努力才得以做成功某事”时应用be able to,不能用can。 例如:He was able to go to the party yesterday evening in spite of the heavy rain。 尽管很大雨,他昨天能来参加聚会。 2、表示请求和允许。 例如:--—Can I go now? —-— Yes, you can。 / No, you cannot/can’t. 此时可与may互换。在疑问句中还可用could, might(不可用于肯定句、否定句或答语)代替,不是过去式,只是语气更委婉。 例如:——- Could I come to see you tomorrow? -—- Yes, you can. ( No, I'm afraid not. ) 3、表示可能性猜测. 例如:The man over there can´t be my uncle. My uncle has gone to Beijing。 那个人不可能是我的叔叔。我的叔叔去北京了。 三、练习题 ( )1.---Susan’s parents have bought a large house with a swimming pool. ---It ______ be very expensive。 A.must B.can C.mustn’t D、can't (完整版)can 的用法及练习 ( )2.The notebook______ belong to Sarah.Her name is on the cover. A.might B.can’t C.must D.mustn't ( )3。——— May I put my bike here? —-— No,you______.You should put it over there. A.couldn't B.needn’t C.mustn't D.won’t ( )4.Boys,you______ be sitting in this room.It is for your teachers only. A.shouldn't B.don’t have to C.won’t D.needn’t ( )5.—-—Whose pizza is this? —-—I think it______ be mine.I’m the only one who ordered a pizza. A.must B.could C.might D.can’t ( ) 6。 My brother can't sing but he ______ play the piano. A。 can't B。 doesn’t C. can D。 don't ( )7。 You look tired。 You ______ to have a good rest。 A。 must B. may C. should D。 need ( ) 8.—-— Why do you think the man is running ? ---He ______ be ______ for exercise because he is wearing a suit 。 A. must , running B。 can’t ; run C。 can't ; running D. could ; running ( )9. --—Mum , I’ve been studying English since 8 o’clock。 ______ I go out and play with Tom for a while? --—No, I’m afraid not. Besides, it’s raining outside now. A. Can’t B。 Wouldn’t C。 May not D。 Won’t 本文来源:https://www.wddqw.com/doc/eaf906c9ecfdc8d376eeaeaad1f34693dbef1089.html