本文主要是介绍英语,语法.情态动词,对大家解决编程问题具有一定的参考价值,需要的程序猿们随着小编来一起学习吧!
情态动词
|
词义&用法
|
注意事项
|
特殊用法
|
can
could
|
1.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 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…too\enough表示"无论怎样``````也不过分","越``````越好":
You can't be too careful.
你越细心越好
|
2.表请求和允许
|
①请求用could 语气委婉
②答语不用 could.
|
3.表“可能性”
|
① can用于否定和疑问句(could不限)
② can (be)表示有时候会(常与sometimes, at times 连用)
|
may
might
|
1.表请求和允许
|
①请求用might语气更委婉。
②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,蛮可以,倒不如"
You may as well stay here over night.
|
2.表可能性“也许”
|
此意常用于肯定句。(might可能最小)
|
3表祝愿
|
固定句型为“May+主语+V原型”:
May you succeed。
|
must
|
1.表“必须”
|
① must多表主观、现在/将来义务; have to多表客观、过去义务
② mustn't表"禁止";否定用needn't / don't have to
|
(1)表示必然结果:
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 name 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/could
|
will
would
|
1.表意愿,决心等
|
Would此时为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 to me afterwards.(命令)They will get enough money from me.(允诺)
(2)可用于祈使句附加疑问句(反义疑问句):(此时would比will委婉) Don’t go now, will you?
(3)would短语:would rather/would prefer宁愿;would like/would love喜欢/想要(见注意①)
|
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 to无“现已无此习惯”之义。)
|
3.表功能,性质
|
叙述真理:The tree will live
without water for 3 months.
|
4.表估计:“想必,大概”(只时态区别)
|
此意表对目前事物的预料。That will be the 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
(shan’t)
|
1.表征求意见(“好不好”)
|
用在第一、三人称Shall the reporters wait outside or what?
|
点2其他示例:
He shall have the book when I finish reading.(允诺)
You shall fail if you don't 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
|
用于第二、第三人称
Passengers shall not talk with the driver while the bus is moving
|
3.表规章、法令、预言:“必须”
|
用于所有人称
Every competitor shall wear a number
|
should
ought to
|
1.表示道义上的责任,义务或要求,
|
有时表示劝告:You ought to /should pay more attention to what your lawyer says.
|
(1)should 用于疑问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)
|
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 ought 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)
|
这篇关于英语,语法.情态动词的文章就介绍到这儿,希望我们推荐的文章对大家有所帮助,也希望大家多多支持为之网!