1、情态动词一.基本用法二.基本含义三.表推测四.问答五.易混辨析情态动词一、情态动词基本用法Though she lost her arm,she still surf.bad,know,win,example,can,young,be,she,hard,take couldclean,give,can,encourage,try,he,borrow,student,easy,happyHis parents _not afford to buy him some things that he needed.could一、情态动词基本用法1.情态动词无人称和数的变化2.情态动词+实义动词原形3.
2、情态动词的否定:情动+not4.情态动词的一般疑问句：情态动词提前(*have to 借用助动词)二、情态动词的基本含义Later,many people were moved by this story.But Amy thought it was nothing,She said,“As friends we 30 give a hand when they need.”30.A.cant B.mustnt C.should D.would二、情态动词的基本含义情态动词情态动词基本含义基本含义 表能力表请求（一般疑问句）或给予许可can 能可以（请求/许可）cant 不能不可以（许可）co
3、uld 能(过去的能力）可以（比can更委婉的请求）couldnt 不能/may/可以（请求/许可）may not/不可以（许可）might/可以（比may更委婉的请求）mightnt/情态动词情态动词基本含义基本含义must必须mustnt禁止have to不得不dont have to不必need需要neednt不需要should应该shouldnt不应该shall应该，将要(一般疑问句，一，三人称)will将要，愿意would将要，愿意（常用于一般疑问句中表请求）1.Its surprising that Mr.Mas little daughter _ speak English so
4、 well.A.must B.can C.mustnt D.cant 2.Look!The traffic light has turned red.We _stop our car.A.canB.cant C.must D.mustnt3.People _ drive after drinking.Its against the law.A.mustnt B.neednt C.couldnt D.wouldnt BC A4.All passengers _ go through safety check before they take a plane.A.can B.may C.must
5、D.could5.You _ return the book now.You can keep it until next week if you like.A.have to B.cant C.mustnt D.neednt 6.I missed the last bus,so I _ go home on foot.A.must B.have to C.mayD.had to CD B7.You look pretty in green,Kate.Thank you.I like green.Green _ give me energy.A.can B.must C.should D.ha
6、s to 8.I have a cold.You _ lie down and rest A.cant B.should C.has to D.can A B三、情态动词的问答Group 1:can/could/may/might三、情态动词的问答Group 2:must&need表能力：can/could1.can肯定回答：Yes,sb.can.否定回答：No,sb.cant.2.could 肯定回答:Yes,sb.could.否定回答:No,sb.couldnt.表请求许可：can/could/may/might肯定回答：Yes,sb.can/of course,sure.否定回答：sor
7、ry,cant./mustnt.(法律，规则禁止做某事)*注意：当委婉请求时，could不是can的过去式，只是语气更委婉而已，宾语从句时态考查易错点。例：1.Could you tell me where the bank _(be)？2.May I smoke in the hospital?No,you _.must&need肯定回答：Yes,sb.must.否定回答：No,sb.neednt./dont have to.Must he sing the song in English?No,he _.A.mustnt B.cant C.neednt D.shouldnt 四、情态动词表
8、示推测四、情态动词表示推测肯定：must（一定）否定：cant（一定不）不确定：can/could/may/might（可能）may not/might not(可能不)提示词：Im not sure.如何判断改题是考基本用法还是推测？基本用法：陈述事实推测：不确定表述,含推测之意或空后有be1.Whose dictionary is this?It _ be Alices.Her name is on the cover.A.must B.can C.may D.might2.Listen!Is that Millie playing the violin in the art room?N
9、o.It _ be her.She has gone to the teachers office.A.may not B.mustnt C.neednt D.cant A D3.I still havent found my pet dog.Im sorry to hear that.You _ be very sad.A.can B.should C.must D.will4.Is Jim coming by train?Im not sure.He _ drive his car.A.must B.need C.may D.will C C五、情态动词辨析五、情态动词辨析must&hav
10、e to区别must：必须（主观上的义务和责任）have to：不得不（客观），有“被迫”之意1.为了活命，我们_ 吃饭。2.我们 _ 完成英语作业。3.由于长得丑，我 _ 多读书。4.工资太低，我 _ 吃土。5.我们_ 赡养父母。can&be able toHe _ swim.他会游泳。He _ swim.他过去会游泳。He _ swim.他将会游泳。can只有现在和过去两种时态且无人称和数的变化be able to的时态有多种且有人称和数的变化五、情态动词辨析need(1)实义动词肯定句：need to do否定句：dont/doesnt/didnt need to do(2)情态动词（常用于一般疑问句和否定句）否定句：neednt do1.You neednt _ it right now if you are busy.A.to finish B.finish C.finishingD.finished 2.You dont need _ it right now if you are busy.A.to finish B.finish C.finishingD.finished B AThanks
