重点英语语法讲解及练习---情态动词学案

这是一份重点英语语法讲解及练习---情态动词学案，共8页。学案主要包含了情态动词的情态意义表示法，情态动词的推测用法，情态动词一般疑问句的回答等内容，欢迎下载使用。


情态动词具有一定词义，不能单独作谓语，必须和动词原形连用一起构成谓语。用来表示愿望、态度或推测等。
一、情态动词的情态意义表示法
考点一:can可表示现在或将来的能力，意为“能;会”。can还可表示请求、允许，意为“可以”。
考点二:culd 可表示过去的能力;当culd 表示允许时，语气比 can 更加委婉和客气。 culdn't 意为“不能”。
考点三:may表示请求、允许，意为“可以”。
考点四:might 表示允许时，语气比 may 更加委婉和客气。
考点五:must 表示义务、命令或必要，意为“必须”，强调主观看法。mustn’t 表示“不允许;禁止”之意。
考点六:have t 意为“不得不”，强调客观需要。
考点七:shuld意为“应该”，既可以表示义务或责任，还可以表示劝告或建议。其否定式为 shuldn’t，意为“不应该”。
考点八:had better d sth.意为“最好做某事”，其否定式是在better 后加nt。
考点九:need表示“需要”，通常用于否定句或疑问句中。
【考例链接】
( )1. We need clean air and water, s we____ prtect the envirnment.
A. can B. may
C. must D. might
( )2.---Hi, yu _____ walk n the grass.
---Srry, I d it again.
A. can't; will B. needn't; wn't C. mustn't; wn't
3.---I’ve bught all the fd fr the party tnight.
---Thank yu. Then I ____ g t the supermarket.
A. can't B. mustn't
C. shuldn't D. needn't
( )4.---Yu lk very pretty, if l ____ say s.
---Thanks a lt fr saying that.
A. must B. may
C. will D. have t
( )5.-What des Justin Bieber's sng Never Say Never impress yu mst?
---It tells us that we____ d almst anything if we never give up.
A. can B. have t
C. shuld D. need
( )6.---Helen, wh___ fix up the cmputer in ur claas?
----I think Jeff can.
A. shuld B. wuld
C. must D. can
( )7.---Many peple play with mbile phnes all day instead f reading bks. -That's t bad. Everyne ____
be a bk lver. Reading is mre enjyable.
A. may B. shuld C. wuld
( )8.---Mm,_____ I play ftball this afternn?
---Sure, but yu ____ finish yur hmewrk first.
A. may; culd B. can, must
C. can; mustn't D. may; can't
( )9. Yu ___ take me t the statin. My brther's taking me.
A. can't B. mustn't
C. shuldn't D. dn't have t
( )10.---Mm, ____I play the cmputer game fr a while?
---I' m afraid yu have t finish yur hmewrk first.
A. must B. need
C. will D. may
( )11.it's getting dark. Yu'd better ____ ut by yurself. lt's dangerus.
A. nt g B. nt t g C. t g
( )12. All the students____ knw cheating in the exam is nt allwed.
A. need B. may
C. must D. can
( )13. Nwadays, sme rbts are very human-like. They ____walk and dance.
A. can B. must
C. need D. have t
( )14.Jenny finally gt the jb because she____ speak English well.
A. might B. must C. culd
二、情态动词的推测用法
(以下情态动词对可能性的推测排列顺序由强到弱)
【考例链接】
( )1. ---Please be quiet. Our teacher is cming.
-It be ur teacher. She has gne t Beijing.
A. must B. may
C. can't D. mustn't
( )2.Yang Jiang be the by's favrite writer. He has written a lt t praise her.
A. can't B. mustn't
C. must D. need
( )3.-I saw yur mther in the library just nw.
--- It be her. She went t Beijing yesterday.
A. can't B. mustn't C. needn't
( )4.-What's wrng with Judy? She has been absent fr tw days.
---Oh, she be ill. Let's g t ask Mr. Green.
A. may B. need C. wuld
( )5.-Let's g climbing. shall we?
---Yu be jking! Dn't yu knw I'm afraid f high places?
A. must B. can
C. may D. shuld
( )6.---Is Tm cming by train?
---He drive his car. I'm nt sure.
A. can't B. may C. must
( )7.The man be ur math teacher. He has gne t Chengdu.
A. must B. might C. can't
( )8.-Lk, the lady in red be ur English teacher.
---N, she be. She is in the ffice nw.
A. must; can't B. can, mustn't
C. may; mustn't D. shall; can't
9.---Excuse me, is this the right way t the Children's Palace? -Srry, I'm nt sure. But it be.
A. mustn't B. might
C. can't D. must
( )10.-Lk! Why are there s many peple?
---There are sme plicemen. I think there a traffic accident.
A. must have B. can have
C. is ging t be D. must be
三、情态动词一般疑问句的回答
考点一:may 表示请求时，用于主语为第一人称的一般疑问句中，其否定回答不用 may nt(不可以)，而用 mustn’t 或 can't。
考点二:在回答由must 引起的一般疑问句时，肯定回答常用 must，否定回答常用 needn't或 dn't have t，表示“不必”。
考点三:在回答由 need 引起的一般疑问句时，肯定回答用must，否定回答用 needn't。
考点四:在回答由culd(请求对方许可，表示委婉语气)引起的一般疑问句时,常用can/cant回答。在回答由can引起的表示请求的一般疑问句时，用can/can回答。
【考例链接】
( )1.---Must we finish the wrk tday?
--- .We have smething else t d tmrrw.
A. Yes, we can B. N, we can't
C. Yes, we must D. N, we needn't
( )2.---Excuse me, I take the magazine ut f the reading rm?
-Srry, yu can't. Just here, please.
A. must B. wuld
C. may D. need
( )3.---Culd yu g t the bkshp with me? I want t buy The Grass Huse by Ca Wenxuan.
---Srry, I .I've prmised Mm t g hme right after schl.
A. can't B. culdn't
C. needn't D. mustn't
( )4.---Must I clean the rm nw?
----N, yu . Yu can d it later.
A. needn't B. can't C. may nt
( )5.---Mm, I visit the Mdem Art Museum next Mnday?
---I'm afraid yu can't. All the museums in this city are clsed n Mnday.
A. wuld B. need
C. shuld D. may
( )6.-Culd I smke here?
---Srry. I am afraid yu .Lk at the sign “N smking"!
A. culdn't B. needn't
C. can't D. wn't
7.-Must I wait here all mrning? I have a lt f wrk t d.
-N, yu . Yu may be back in the afternn.
A. mustn't B. can't C. dn't have t
情态动词专讲专练参考答案:
一、情态动词的情态意义表示法
1-5 CCDBA 6-10 DBBDD 11-14ACAC
二、情态动词的推测用法
1-5 CCAAA 6-10BCABD
三、情态动词一般疑问句的回答
1-5 CCAAD 6-7 CC情态动词
肯定式
否定式
疑问式
must
必定;必然
/
/
shuld
应该
应该不会
/
can
/
不可能
有可能吗
culd
微弱的可能
不可能
有可能吗
may
或许;也许
可能不
/
might
可能
可能不
/