情态动词的一些特定用法.ppt

情态动词小结,Model Verbs,will,1.,用于祈使句的反意疑问部分： will you? / wont you?,表临时决定做-,表意愿 (“愿意”),主语是物时， will 表“起作用”.,A,B,A,D,比较,1）be to do: 表示事先商定、安排，可能性，必要、责任The students are to meet at the school gate tomorrow. 明天学生们将在学校大门口集会。 2) be going to do: A表示将要发生的事情或打算最近要进行的动作。 It is going to rain soon. 快要下雨了。 B（主将从现）在含有条件状语从句的主从复合 句中，主句一般不用be going to，而常用will （第一人称用shall）。,3) be about to do: 1) 表示即将发生的动作，在时间上指最近的将来。 在含有be about to do的句子中，不能再加时间状语。 We are about to start. 我们就要出发了。 The medical team is about to start immediately. The medical team is about to start.,Ive come out without any money. Never mind I _ you some. A. am going to lend B. will lend C. have lent D. am to lend 事先考虑好的，用be going to； 临时想到的，则通常用will.,Where is the telephone book? I _(get)it for you. Why are you taking it out? I _(wash) it.,will get,am going to wash,(临时想法),(事先考虑),Try to summarize them by yourselves,2.,would,A,C,would 指 “过去常常”, 习惯性动作,C,C,would 常用于虚拟语气,would do would have done,现在 / 将来,过去,3.,must,D,B,D,C,mustnt 表绝对禁止,must “非要，偏偏”,must 表猜测 “一定”,must do must have done,“现在一定”,“过去一定”,4.,can,A,A,C,A,表能够,can 可用于疑问句，否定句表猜测,cant -too / enough 无论怎样-也不为过,can 用于肯定句， 表客观理论上很可能,D,5.,shall,A,A,B,D,D,D,用于第一，三人称疑问句， 表征求意见,用于第二，三人称陈述句， 表允诺，警告，威胁，命令 或法律，规定,6.,should,C,A,C,B,C,表劝说或建议,表猜测 “应该会” 可能性较大,“竟然”,对将来虚拟的if条件句中， 把if省略，should放句首,should have done,ought to have done,含情态动词表推测的反义疑问句, He must be helping the old man to water the flowers, _? A. is he B. isnt he C. must he D. mustnt he,B,7., You must have read about Dickens, _? A. mustnt you B. havent you C. cant you D. didnt you, Tom cant have said so yesterday, _? A. hasnt he B. can he C. did he D. havent he,情态动词 + have done 的用法,must have done,cant / couldnt have done,might have done,shouldnt have done,neednt have done,c