按课时压缩文件包单元知识点归纳语法

cancan的意思是“能、会、可能、可以”can和could。如：ShecanspeakEnglishfluently.她能流利地语Theycouldcometous.cancouldcan’tcouldn’tcan’tHersistercan’tskate.妹妹不会滑冰Hecouldn’tgototheofficeateight.Shecan’tbeinWashingtonbecauseIsawherherejustnow.她不可能去了，因为刚才我在这里还见到了她。mayYoumayusemyEnglish- dictionary.你可以用我的英汉MayIputmybikehere?Hisanswermaybecorrect.Theymaysetouttodayortomorrow.mustn’t。—MayIuseyourcomputer?—Yesyoumay.—Noyoumustn’t.mightmay的过去式，用于表示在客观环境允许的范围HemighthavetoldyouaboutitlongmustWemustobeytherules.须遵守规则。Anyonemustn’tbelateforclass.谁都不能上课Yourfatherworkedalldaylong.Hemustbetired.你父亲工作了mustmust，进行否定回needn’t。如：—Mustwewaitforthem?须等他们吗—Yesyoumust.—Noyouneedn’t.need情态动词need表示人们说话时对某件事情必要性，一般Youneedn’ttalkaboutthismatter.Needweanswerthisquestion?willwillyou+动词？可以表示“请你为我做某事好吗？”，Willyoushowmesomepens?把笔给我看看好吗？（请求对方做这里的will可以用would替代，并且在动词前面可以加Wouldyoupleaseclosethedoor?劳驾，关上门好吗？shallI(we)+动词…?表示征求对方意见。如—ShallIopenthewindows?—Yesplease.—Yesthankyou.wouldwould是will的过去式，作为情态动词表示可以请你……wouldwouldlike中，后面加名词、代词、不定式作宾语。可与主语缩写为’d。请注I’dlikesomeoranges.要点儿桔子—Wouldyouliketosingasong?—YesI’dliketo.—No,thanks.Youshouldwaitalittlemore.used否定句：usednotto+动词didn’tuseto+动词疑问句：Used+主语+to+动词Did+主语+useto+动词如：Heusedtoliveinthissmallvillage.HeusednottoliveinthissmallvillageHedidn’tusetoliveinthissmallvillage.他过去不