Grammar：Modalverbs情態(tài)動詞1情態(tài)動詞（modalverbs)：表示說話人的語氣或情態(tài)，如請求、命令、愿望、能力以及可能性等。英語的情態(tài)動詞有：2

can/couldmay/mightmust

shall/shouldwill/would

needhaveto能夠可能必須應該意愿敢需要不得不+動詞原形34Shall一般只能用于第一人稱。IshallthinkitoverandLetyouknowmyidea.

我將考慮一下此事，然后告訴你我的想法。5情態(tài)動詞不能單獨作謂語動詞，只能與動詞原形一起做謂語，沒有人稱和數(shù)的變化。Abirdcanfly.Fishcan’tlivewithoutwater.Youmusthandinyourhomeworkatonce.Youmustn’ttalkloudlyinpublic.6能夠(表能力)可以(表允許)必須主語+can+動詞原形主語+may+動詞原形主語+must+動詞原形主語+cannot/can’t+動詞原形主語+maynot+動詞原形主語+mustnot/mustn’t+動詞原形Can+主語+動詞原形？May+主語+動詞原形？Must+主語+動詞原形？Yes,主語+can.No,主語+can’t.Yes,主語+may.No,主語+maynot.Yes,主語+must.No,主語+needn’t.在口語中可用can代替，但may更禮貌。7大家應該也有點累了，稍作休息大家有疑問的，可以詢問和交流81.Myelderbrother______________(能)driveacar.否定句：一般疑問句：肯定回答：否定回答：就劃線部分提問：Practice

canMyelderbrothercannot/can’tdriveacar.Canyourelderbrotherdriveacar?Yes,hecan.No,hecan’t.Whatcanyourelderbrotherdo?92.You__________________(可以)leavenow.

否定句：一般疑問句：肯定回答：否定回答：就劃線部分提問：Practice

mayYoumaynotleavenow.MayIleavenow?Yes,youmay.No,youmaynot.WhenmayIleave?103.Lily_________________(必須)gotothelibrary.

否定句：一般疑問句：肯定回答：否定回答：就劃線部分提問：Practice

mustLilymustn’tgotothelibrary.MustLilygotothelibrary?Yes,shemust.No,sheneedn’t.WheremustLilygo?11A.用must(not),may(not),can(not)填空：1.—Idon’tunderstandthisword.___________Iuseyourdictionary?--Yes,pleaseuseit.2.Thetrafficlightisturningred.We____________stop.3.You______________borrowtwobooksatatime.4.Tom__________playtabletennis,buthe_________playfootball.5.—Doctor,_____________Itakemuchmedicine?--No,youneedn’t.Butyou______________drinkalotofwater.6.Tomisgoodatdrawing.He______________drawwonderfulpictures.7.You_______________smokehere.It’sdangerous.8.--MayIturnontheTV?–No,you_________.Mydadissl