must的用法及练习.doc

must的用法及练习.doc

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情态动词must的用法

1.must表示必要性，“必须”（肯定句，疑问句常见）

①Youmustgotobednow.

②MustIstartatonce?

2.否定式mustn’t表示“禁止”

①Youmustn’tsmokehere.

②Wemustn’tbelateagain.（不许我们再迟到了）

3.由must引导一般疑问句时，肯定回答用must，否定回答用needn’t或don’thaveto.

----MustIstayathome?

----Yes,youmust./No,youneedn’t

4.当出现反问句式时，如果其陈述部分must表示“必须，有必要”时，反问句用needn’t，如果其陈述部分mustn’t表示“禁止”，反问句用must.

①----Youmustgothere,needn’tyou?

----Yes,Imust./No,Ineedn’t/don’thaveto.

②Youmustn’tgothere,mustyou?

5.must表示推测时，有3种形式时，反问句与must后的动词保持一致。

⑴对现在的动作进行推测

①Youmustbehungrynow,aren’tyou?

②Youmusthavethewrongnumber.Thereisnosuchperson,haven’t/don’tyou?

⑵对正在进行的动作进行推测

Hemustbedoinghishomework,isn’the？

⑶对过去发生的动作进行推测

①Youmusthavereadthisbook,haven’tyou?

②Itmusthavesnowedyesterday,didn’tyou?

6.must用于反语，表示劝诫。

-----Mustyoumakesomuchnoise?

（你非得吵这么大声吗？

）

-----Sorry,I’lltrynotto.

（2005全国Ⅲ卷）John,lookatthetime,__A__youplaythepianoatsuchalaterhour?

A.mustB.canC.mayD.need

7.与说话人的愿望相反，“偏偏，偏巧”。

①Idon’twanttobelate,butmycarmustbreakdownonhalfway.（2004天津）

②----Whoisstandingoverthere?

----well,ifyou__C____know,thegirlisMarry.

A.mayB.canC.mustD.shall

③WhymustitrainonSunday?

8.mustnot（always）bedoing.“不应该，一定不要”.always加重不赞成的语气。

①Youmustn’talwaysbetalkingsomuch.

②Whenyoulearnaforeignlanguage,youmustn’talwaysbetranslatingeverythingintoyourown.

Must用法专练

一、单选

1.John,lookatthetime.______youplaythepianoatsuchalatehour?

（2005）

A.MustB.CanC.MayD.Need

2.He_____havecompletedhiswork;otherwise,hewouldn’tbeenjoyinghimselfbytheseaside.

A.shouldB.mustC.wouldn’tD.can’t

3.Iwasonthehighwaywhenthiscarwentpastfollowedbyapolicecar.They______atleast150kilometersanhour.

A.shouldhavebeendoingB.musthavebeendoing

C.couldhavedoneD.wouldhavedone

4.----Tomisneverlateforwork.Whyisheabsenttoday?

----Something_____tohim.

A.musthappenB.shouldhavehappened

C.couldhavehappenedD.musthavehappened

5.Thiscakeisverysweet.You______alotofsugarinit.

A.shouldB.couldhaveputC.mightputD.musthaveput

6.Accordingtothelocalregulations,anyonewhointendstogetadriver’slicense______takeaneyetest.

A.canB.mustC.wouldD.may

7.-----Musthecometosignthispaperhimself?

----Yes,he______.

A.needB.mustC.mayD.will

8.-----MayIsmokehere?

----Ifyou_____,chooseaseatinthesmokingsection.

A.shouldB.couldC.mayD.must

9.Incrowdedplaceslikeairportsandrailwaystations,you_____takecareofyourluggage.

A.canB.mayC.mustD.will

10.----Shelooksveryhappy.She______havepassedtheexam.

----Iguessso.It’snotdifficultafterall.

A.shouldB.couldC.mustD.might

11.----Guesswhat!

IhavegotAformytermpaper.

----Great!

You_____readwidelyandputalotofworkintoit.

A.mustB.shouldC.musthaveD.shouldhave

12.WhenIwasyoung,IwastoldthatI______playwithmatches.

A.wouldn’tB.needn’tC.mustn’tD.daren’t

13.We______keepacoolheadonoverheatingdevelopment,forit_____havenegativeinfluenceuponnationaleconomy.

A.should;mustB.must;wouldC.might;couldD.must;may

14.----______Ibookatablefordinnerafewdaysaheadoftime?

----Yes,you_______.Therestaurantisalwaysfull,especiallyduringtheholidays.

A.Must;willB.Must;canC.Shall;shallD.Shall;must

15.----It’shardtobelievethatJack_____havefoughtwiththepoliceman.

---Yes.Ifone_____askfortrouble,itcan’tbehelped.

A.would;willB.must;mayC.should;mustD.need;dare

16.Idon’twanttobelate,butmycar_______breakdownonhalfway.

A.mustB.canC.mayD.will

17.Jonney,you______playwiththeknife.Itisdangerous.

A.won’tB.mustn’tC.shouldD.shall

二、用must正确形式填空

1.Youmustgothererightnow,_______?

2.Youmustfinishtheworkontime,____________?

3.Wemustn’tbelate,__________?

4.Parentsmustn’tshowtoomuchconcernfortheirchildren,__________?

5.Hemustbeaworker,_________?

6.YoumusthavestudiedEnglishformanyyears,____________?

7.Shemusthavearrivedthereyesterday,_________________?

8.-----Mustwegonow?

--------__________________.（肯/否定回答）

9.You_______alwaysbetalkingsomuch?