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1、原形原形过去式过去式词义词义同义词组同义词组cancould能够能够be able tomaymight可以、也许可以、也许mustmust必须必须have tohave tohad to必须、不得不必须、不得不musthad betterhad better最好最好可以是实义动词和情态可以是实义动词和情态动词动词needneeded需要需要daredared敢于敢于shallshould应该应该ought towillwould愿意愿意used to过去常常过去常常ought toought to应该应该should1.can和和 could2.may 和和might3 must 和和 ha
2、ve to1、English is a language that many people around the world not speak perfectly but at least_ understand.A.may;can B.would;might C.will;must D.could;might【答案解析】根据句意和句子的语气可知，第一空表示一种可能性，用may not speak 可能不会说；第二空表示有某种能力。答案A。2、Didnt they come to the party last week?Yes.They didnt want to come with us
3、at first,but then we _ persuade them.A.Would B.could C.were able to D.had to【答案解析】根据上下文语境及讲话人语气，选项动作表示经过努力才完成的。在这种语气的肯定句和疑问句中，常用be able to，在否定句中可用can。答案 C。3、I promise her daughter _ get a nice present on her birthday.Will it be a big surprise to her?A.should B.must C.would D.shall【答案解析】根据讲话人语气可以知道，选
4、项部分表示讲话是给对方的一种承诺，故应该选情态动词shall用于第二或第三人称用作主语的句子结构中。答案D。4、All of us had a good time in the picnic last Sunday.Pity you werent there.I really _come but I was looking after my mother in hospital.A.mustB.ought toC.need haveD.should have【答案解析】根据上下文和讲话人语气，选项情态动词表示过去本该做而实际未做的事，故应选用should have done 或ought to
5、 have done。must do，ought to do表示还未发生的动作。need have done常用于否定或疑问句，表示本来不必干某事。答案 D。5、Did you scold him for his carelessness?Yes,but _ it.A.I would rather not doB.Id rather not have doneC.I shouldnt doD.Id better not do【答案解析】根据上下文语境可以知道，选项动作是对过去事情的推测，表示过去已经责怪，而宁愿该事情没有发生之意。故选Id rather not have done，其它三个选项表示对将要做的事情的态度。答案B。6、Just as we were sitting down to have dinner,the telephone _ ring.A.must B.could C.might D.need【答案解析】must 在此表示说话人的愿望或感到不耐烦，意思为“偏要”。句意：正当我们吃饭时电话铃偏偏响了。其它选项无此意义，答案A。
情态动词的特点
