情态动词归纳表

1、情态动词归纳表情态V词义&用法注意事项特殊用法can could1.表具备某种能力Can表现在能力；Could表示过去能力. 可用 be able to 代替； was/were able to to 表示成功做了某事（1）表惊异、怀疑、不相信、不耐烦等。 （此意常用于否定句、疑问句或惊叹句语气）Can/Could this be true?（2）can not tooe no ugh 表示无论怎 样也不过分,越越好:You cant be too careful.2.表请求和允许 请求用could语气委婉 允许不用could.3.表“可能性” can用于否定和疑冋句（could不限） can

2、 （be）表示有时候会（常与 sometimes, at times 连用）may might1.表请求和允许 请求用might语气更委婉。 允许时用may,表示“可以”（表示允 许时不用might）。(1) may/might well+V 原形：表完全 可能，很可能=be very likely to:He may well be proud for his son.(2) may/might as well+V 原形：”最好， 满可以，倒不如”You may as well stay here over ni ght.2.表可能性“也许”此意常用于肯定句。（might可能最小）3表祝愿固

3、定句型为“ May+主语+V原型”：May you succeed!must1.表“必须” must多表主观、现在/将来义务； have to多表客观、过去义务 must nt表”禁止”；否定用 need nt / dont have to（1）表小必然结果：All men must die.人固有一死。（2） 表示一种与说话人愿望相反、不耐 烦的感情色彩，可译为“一定要、偏偏、 非要”：If you must know, her n ame is Mary.2.表推测：“肯定 是、准是”只用于肯定句。在否定句/疑问句中用can/couldwill would1.表意愿，决心等Would此时为

4、will过去式，无意义差别（1）will表命令（说话者确定命令一定会得到执行）或允诺：You will report tome afterwards.（命令 ）They will get eno ugh money from me.（允诺）（2） 可用于祈使句附加疑问句 （反义疑 冋句）：（此时would比will委婉）Don go now, will you?（3）woul 短语：would rather/would prefer 宁愿； would like/would love 喜欢 / 想要（见注意）2.表经常性，习惯 性，倾向性，Would表过去反复的动作/某种倾向（相 对于used

5、 to无“现已无此习惯” 之义。）3.表功能，性质叙述真理：The tree will leave withoutwater for 3 mon ths.4.大别表估计：“想必， 概”（只时态区 ）此意表对目前事物的预料。That will bethe postman ringing.（would 表示过去 / 现 在；will表示现在/将来）5.(表请求/要求Will you ?）此意用于疑问句，常与you连用Will you give me a piece of paper?shall(sha nt)1.表征求意见（“好 不好”）用在第一、二人称 Shall the reporters w

6、ait outside or what?点2其他示例：He shall have the book whe n 1 finish readi ng.允诺)You shall fail if you dont work harder.(警 告)You shall come at once.(命令)2.表允诺、威胁、 警告、命令或根据 规定有义务做用于第一、第二人称Passengersshall not talk with the driver while the bus is movi ng3.表规章、法令、 预言：“必须”用于所有人称Every competitor shall wear a

7、nu mbershould ought to1.表示道乂上的责 任，义务或要求，有时表示劝告：You ought to /should pay more atte nti on to what your lawyer says.（1）should用于疑冋句中 表示说话人 对某事不能理解，惋惜，感到意外，赞叹，愤怒、惊异等感情，意为“竟会”,有时也用于陈述句中（2）Should还可以用在if引导的条件从 句，表示一件事听起来可能性很小，但 也不是完全没有可能，相当于“万一”的意思。（见注意）2.表示推测和可能 性，是“（按理说） 应该之意肯定的语气没有 must用于推测时强 This pen o

8、ught to /should be yours.3.表示说话人的一 种谦逊，客气，委 婉的语气此意常用于第一人称时：You are mistaken , I should say .（依我看 你是搞错了）高考热点透视热点一：表猜测的情态动词的用法。词形使用场合对现在和未来的推测对过去事情的推测must肯定句must+动词原形must have donemay/migh t肯定句、否定句may+动词原形may/might have donecan/could匸否定句、疑问句can/could +动词原形can/could have doneshould肯定句、否定句、疑问句用来表示一种估计的情

9、况按理会/估计会should+动词原 形should have done热点二：情态动词 +have done情态动词+have done的用法有两种含义:1. 对过去情况的猜测。由表猜测的情态动词+have done构成。上表已经提到。2. 表示与过去事实的主观设想。有轻微的责备、后悔之意。请参看下表：情态动词+have done用法例句must have done对过去进行推测表想必、准是一定做The light were out. They must have been asleep.can have done否定、疑冋句中，表怀疑和不肯定”He canhave forgotten it

10、.canthave doneCan he have gone to his aun?could have done表 本来可以做某事的（却没有）否定表 不可能”You could have done better, but you were too careless.couldn have doneMr wang couldnhave gone to Beijing, for I saw him just now.might have done表本来应该或You might have given me more help, though you were busy.可以/能做某事的（却没有）s

11、hould/ought to用于肯定句中时，You should/ought to have been more careful.have done表示 本该做某事”而实际上未做；用于 否定句中时，则表示不该做的事反而做 了。You shouldn have spoken to your parents in this way.neednhave done表示做了本来不必The weather turned out fine. You neednhave taken your umbrella with you.去做的事。had better have done表示当时做了某事就好了 ” 相反

12、的含义。，其否定句表You had better have started earlier.You had better not have quarrelled with her.would rather have done表示当时宁愿I would rather have taken her advice.做了某事”，其否定句表相反的含义。两 者都表后悔”之意。I raised objections at the meeting, but now I would rather not have done that.Would like/love to have done表示愿意做某事，但未做

13、成。I would love to have gone to the party last night, but I had to work extra hours to finish a report.热点三： shall, will，must 等1. Shall用于第一人称疑问句中表示说话人征求对方的意见或向对方请求。例:The room is so dirty.we clean it?Of course. （ 03 上海春招 ）A. Will B. Shall C. Would D. Do用于第二人称陈述句表示说话人或他人的意图、命令、允诺、警告、命令等。例:The interestbe divided into five parts, according to the agreement made by both sides,declared the judge. （04重庆，24）A. may B. should C. must D. shall2. Will 表示意愿或意志。例：Iargue