情态动词can-may-must的用法-中考语法解析ppt课件.pptx

1、情态动词情态动词can,may,mustcan,may,must的用法的用法 情态动词后接动词原形情态动词后接动词原形;没有人称和数的变化没有人称和数的变化;不能单独作谓语不能单独作谓语,与后面的动词共同作谓语与后面的动词共同作谓语;其否定形式在后面直接加其否定形式在后面直接加not。Modal verbs情态动词情态动词 can/can not may/may not must/must notModal verbs情态动词情态动词can/can not1.表示能力表示能力(会会)Mary can speak English,but she can not speak French.2.表示

2、允许表示允许(可以可以)Can I use your dictionary?I cant find mine.3.表示表示推测推测(可能可能)-通常用于否定形式通常用于否定形式 He cant be in the office.I saw him go out just now.1.S1 _ Kitty _?S2 _.2.S1 _ Kitty _?S2 _.Can spellYes,she canCan addNo,she cant3.S1 _ Derek _?S2 _.4.S1 _ Kitty _?S2 _.Can subtractYes,he canCan multiplyNo,she c

3、antmay/may not1.表示表示允许允许(可以可以)May I come in?2.表示表示推测推测(可能可能)-通常用于肯定形式通常用于肯定形式 She may be still waiting for us.3.表示祝愿表示祝愿 May you have a happy weekend.may的用法的用法:may/may not以以may开头的疑问句，其否定回开头的疑问句，其否定回答用答用cant或或 mustnt。-May I go home now?-Yes,you may.No,you cant.may not的用法的用法:Answers:1.May I carry your

4、 bag for you?2.May I open the door?3.May I get you a chair?4.May I switch on the TV?5.May I borrow your new bicycle?must/must not1.must表示必须表示必须 You must do your homework first.2.must表示表示 一定一定(肯定性推测肯定性推测)He must be at home.must的用法的用法:must/must not1.mustnt表示禁止表示禁止(不准；不允许不准；不允许)You mustnt smoke here.2.

5、以以must开头的疑问句，其否定回答开头的疑问句，其否定回答要用要用neednt.-Must I clean the classroom now?-Yes,you must.No,you neednt.must not的用法的用法:What do the signs mean?Do you know?You must not cycle.You must be careful.You must turn left.You must not enter.You must pay ten yuan.You must keep silent.You must not turn right.You m

6、ust not smoke.用适当的情态动词填空：。1.I can play football._you swim?2.Dont worry.You _ return me this book tomorrow.3.My grandma is ill.You _ talk so loudly here.4.I cant play with you.I _finish my homework first.5.I_ get up early tomorrow.because I have a meeting.6._you please open the window?Canmaycantmustm

7、ustCan9.Nobody _live without air.10._he speak Chinese?Yes,a little.11.The book _ be returned before Saturday.12._I come in?Yes,please.13.You _give up smoking at once.Its bad for your health.14.Excuse me._I ask you a question?15._you tell me where the station is?16._ I finish the work now?No,you _.You _ do it this evening.17.May I use your dictionary?Sorry,you _.I am using it now.18.Look at the ground.Its very wet.It _ have rained last night.can Can mustMay must May Can Must neednt can cant must