六年级下册语法专练小学英语总复习语法专练（二）（情态动词、介词）

六年级下册语法专练小学英语总复习语法专练（二）（情态动词、介词） 情态动词 情态动词是动词的一种，表示说话人对某一行为或状态的看法或观点，如需要、可能、意愿或怀疑等。情态动词没有人称的变化，通常情况下后面跟动词原形。下面我们一起来简单归纳小学阶段学过的情态动词的用法。 ★ can 1． 表示能力，意思是“能；会”，“can’t／cannot”意为“不能；不会”。例如： 1) I can play the piano, but I can't play the guitar. 2)-Can you dance? -Yes,I can./No,I can't. 2． 表示请求和允许，意思是“可以”。例如： - Can we play football here? -Yes,you can. / No, you can't. 3．could是can的过去式。句型“Could ．．．？”表示有礼貌的请求。例如： 1) I could write when I was five. 2) Could you please lend your bike to me? ★may 1．作“可以”时，表示许可。例如： You may hand in your homework tomorrow. 2．句型“May I．．．？”表示请求许可，肯定回答常用“Certainly．”或“Yes，please.”，否定回答多用“No，you mustn’t／can’t.”。例如： —May I sit here? —Certainly. / Yes, please. / No, you mustn't / can't. ★ must 1．作“必须”时，表示必要性。“mustn’t”意为“不准；禁止”。例: 1) We must go to school on time. 2) When the traffic light is red, you mustn't cross the road. 2． 句型“Must I．．．？”的肯定回答用“Yes，you must．”，否定回答多用“No， you needn’t.”。例如： —Must we go there early? —Yes,you must./ No, you needn't. ★would would 表示说话人的意愿，常与like to连用，意为“想要”，语气较委婉。句型“Would you like to ...？”用于询问对方的意愿或发出邀请。肯定回答用“Yes，I＇d like／ love to.”，否定回答用“No，thanks.”或“I＇d like／ love to， but I＇m busy.＂。例如： —Would you like to have a cup of tea? —Yes,I'd like to. ★should should表示义务，意为“应该”，“shouldn’t”意为“不应该”。例如： 1) We should take care of the old people. 2)You shouldn't talk to your mother like that. 巩固练习 一、选择正确的答案填空，并把其字母编号写在括号内。 ( )1．一_____________I come in? —Yes,please. A. Must B.May C.Would ( )2.—_____________I clean the house today? —No,you_____________. You can clean it tomorrow. A. Must; mustn't B.Would; wouldn't C.Must;needn't ( )3.—_____________you like some soup? —No,thanks. A.Can B.Would C.Could ( )4.Lucy can_____________very well. A.dance B.dances C.dancing ( )5.Excuse me._____________you tell me the way to Yuexiu Park? A.Should B. Must C.Could ( )6.Vegetables are good for us. We_____________eat vegetables every day. A.should B.may C.could 二、根据