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1、系动词、助动词、情态动词一、情态动词1.can(could):能够、可能、可以；may(might):可以、可能；must:必须；shall:将会；should:应该；will:将会，愿意；would:将会2.半情态动词(后接动原，但否定和疑问句要借助do)：haveto不得不，hadbetter最好，usedto过去常常3.情态动词无三单(haveto除外)；不能单独使用，后接动词原形共同构成谓语4.need既可做实义动词又可做情态动词(作实义动词，后接todo/doing,否定don’tneedtododo/doing;作情态动词，后接动词原形，否定
2、needn’tdo)5.表推测：mustbe一定是（语气最肯定），canbe可能是，maybe也许是（语气最不肯定）；can’tbe一定不是（语气最肯定,mustbe的否定形式）6.maybe也许(副词,常用在句首)；maybe也许是(谓语动词，用在句中)7.must与need开头的一般疑问句，肯定回答用must,否定回答用needn’t/don’thaveto(不必).8.may开头的一般疑问句，肯定回答用may/can,否定回答用can’t/mustn’t.二、系动词1.系动词后可接形容词。2.表示状态的系动词be(am,is,are,was,wer
3、e,been),keep,stay,表示感觉的半系动词feel(摸起来，感觉),look(看起来),smell(闻起来),sound(听起来),taste(尝起来）;三、助动词1.助动词本身无词义或意义不完整，必须和实义动词共同构成谓语。2.常用的助动词：be(am,is,are,was,were,been,being)用于进行时态或被动语态；do(does,did)用于一般现在时或一般过去时的否定句和疑问句；have(has,had)用于完成时态；will,shall,would,should用于将来时态，shall/should只能用于第一人称。情态
4、动词与系动词练习题一、基础题1.-Where'sMrLee?Ihavesomethingunusualtotellhim.-You________findhim.He________Japan.A.maynot;hasgonetoB.maynot;hasbeentoC.can't;hasgonetoD.can't;hasbeento2.-Finishdrawingahorseintenminutes.OK?-Sorry.It________insuchashorttime.A.maydoB.can'tbedoneC.mustdoD.needn'tbedo
5、ne3.Ihavemyownroominmyhouse,soI________dowhatIwantinit.A.mustB.havetoC.needtoD.can4.________youmendmycar?I______notstartit.A.Would;wouldB.Must;mustC.Can;canD.May;may5.________sheridewhenshewasthreeyearsold?A.CanB.CouldC.NeedD.May6.Theboy________answerthiskindofhardquestionsoneyea
6、rago.A.canB.mayC.could7.Whoisthemanoverthere?IsitMrLi?-No,it________behim.MrLiismuchtaller.A.mustn'tB.maynotC.can'tD.needn't8.-Listen!Someoneissinginginthenextroom.Who________itbe?IsitWeiFang?-No.It________beher.Sheisatschoolnow.A.will;maynotB.must;mustn'tC.may;can'tD.may;won't9.
7、-IsMrHuinthereadingroom?-No,he________bethere.HehasgonetoTianjin.A.mustn'tB.needn'tC.won'tD.can't10.________youpassmeapen?I'dliketowritedownthetelephonenumber.A.NeedB.Could C.MustD.Should二、提高题1.-MayIgotothecinema,Mum?-Certainly.Butyou________bebackby11o'clock.3A.canB.mayC.mustD.n
8、eed2.-SARSissuchaterribledisease.-Yes,it
