几个英语问题..!! 关于情态动词的

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一个英语问题,问在什么时候是用情态动词,还有情态动词有哪些?~

情态动词是一种本身有一定的词义,但要与动词原形及其被动语态一起使用,给谓语动词增添情态色彩,表示说话人对有关行为或事物的态度和看法,认为其可能、应该或必要等。情态动词后面加动词原形。

情态动词有四类:
①只做情态动词:must,can(could),may(might)……
②可做情态动词又可做实义动词:need,dare,will
③具有情态动词特征:have(had,has) to,used to,ought to
④情态动词表猜测:一肯一否三不定(must一肯,can not一否,may,might,could,三不定。)
注:mustn't代表强烈禁止 must表示主观,have to表示客观。

详细内容请查看:http://baike.baidu.com/view/190314.htm

希望能帮到你!

1.can仅表示有能力做成某事但不含有做成的意思,be able to 表示的是能够做成某事,且做了,若用were able to 则表示本来能够做成,却没做。
2.need做情态动词一般用于疑问句或否定句中,该题中的needn't看起来像是情态动词,但别忘了情态动词后要有实义动词,假如后面接一个get就可以选D了。C选项中的need是及物动词后面直接跟宾语。
3翻译当Gordon Howard 告诉你他是一个百万富翁时,可能是在和你开玩笑,因为他总是戏弄别人。后面那句一般现在是表示的是他一贯如此,所以用一般现在时。前面是对过去发生的事的一种推测,属于虚拟语气范畴。对过去发生的事进行推测时,只能用情态动词+have done
may have been推测过去可能处于某种状态
may have done 推测过去可能干过。。。
may have been doing推测过去可能一直在干。。。
He may have been a teacher as a young man ; he is good at teaching his kids .
He may have lost his job because he can't afford toys for his son now .
He may have been looking for a job because he is out of work now .
4.John正在踢足球,但是他现在应该在学习。should be doing表示应该正做某事却没做
5.题中说的是小事侯的事,所以用could比can更合适,至于你说的be able to 句子就得改为
When I was young, I used be able to run ten miles without stopping.
“I could” and “I was able to” are not the same. “I could” means I used to be able to, but now I’m not able to. “I was able to” means I have the ability at one particular time in the past.
好费劲,给分吧!

1.will,would,shall作为情态动词时的用法
will:1.构成一般将来时e.g:I will go to bed.
2.表达委婉的询问语气e.g:Will you please close the door?
would:1.表委婉语气(可与will互换):e.g:Would you please close the door?
2.表愿望或请求:I would like to do that。
shall:1.构成一般将来时,用于第一人称e.g:I shall go to the bed.
2.Shall用于第二、第三人称,表示说话人给对方命令、警告、允诺或威胁。e.g:You shall fail if you don't work harder. (警告)
He shall have the book when I finish reading. (允诺)
He shall be punished. (威胁)
3.建议:e.g:Shall we go to the park.
2.can have done 的意思
本可以...。表示一已经做完的事,含有一种抱怨的意义
e.g:You can have eaten it.
3.can be 能表示推测吗
不可以。表推测时,英语中只使用must,may,might,may not和can't。这五个表达的语气依次递减:
must:一定(语气肯定)
may:也许(不很肯定)
might:或许(比may语气更弱)
may not:也许不(表否定)
can't:一定不(must的反义)
推测现在的事情用must,may,might,may not和can't+do或be
e.g.She must be at home now.
The boy may play now.
推测过去的事情用must,may,might,may not和can't+have done
e.g.She might have been ill yesterday.
He must have hold the party.
注意:表推测的must,may,might,may not和can't是不可以与I think...连用。因为I think...已有推测的含义,故不能连用
4.would like to,should like to什么意思
would like to指想要做某事。同义词是want和feel like doing
至于should like to根本没有这种用法
5.By no means________misunderstand you
A.could we B.shall we
C.we shall D.we can
答案是A 为什么B不可以?
shall we表示的是疑问语气。这里是将状语提前,所以要倒装,将情态动词提前。实际上可以说成We could misunderstand you by no means.
6.I knew that if I wasn't able to avoid a mistake,chances were that no other doctor________,either.
A.should have been B.could have been
C.ought to have been D.must have been
答案是B 为什么??? 顺便解释下句子的意思.
这里could have been是在虚拟语气中使用的。有机会
意思是我知道假如我不能承受一个错误,其他医生都没有机会的。

1. will是一般情况下用的 可以说通用
比如: i will go to the library,或者 will you pass that book to me, please?
would 一般表示委婉和请求,有礼貌,经常跟pleasr
比如: would you please pass that book to me? 或者 i would like a cup of tea, please
shall表示建议
比如: shall we go to the park?
2.表示其实可以早些做完,但是这种用法基本没有,也没人用,生活中我从没遇到
一般都是 can be have done,
比如: it can be have finished early
3. 可以表示推测,但是一般都用it may be hers或者it could be right
4. 前者表达自己的意思和情愿,委婉方式的 例子见1, 后者那个,我没见过,现实中更没有
5. shall we用在疑问句,could we其实是we could, 表示我们能够
6. 我知道如果我不能避免一个错误,就也没有机会让别的医生看到了. could have,能够

neither,either

Neither的意思是“两个都不”(not either);either的意思是“两个中的任何一个”(one of two)或“两个中的各一个”(each of two)。

Neither常和nor用在一起;either常与or用在一起。

下面先看两个neither的例句:

Neither Mr.Li nor Mr.Zhang is in Hong Kong now.

李先生和张先生现在都不在香港。

I like neither of the novels.

这两本小说我都不喜欢。

在口语里,我们常用not either代替neither。如上面第二个句子,在口语中可以说:I don't like either of the novels.

下面是either的例句:

Either Mr.Li or Mr.Zhang is in Hong Kong now.

不是李先生就是张先生现在在香港。

We can take either road.

两条路我们可以任挑一条走。

在上面两句中,either表示one of two的意思。在下面的句子中,either作each of two和each of more than two things解:

They took seats on either side.

他们在两边就座。

Just above the platform,at either of the four corners is an exquisite female bust.

就在平台上,四个角落的每个角都有一个精致的妇女半身像。

在美国英语中,当either表示both和each的涵义时,它的动词用复数形式。例:

Either of them are enough to drive a man to distraction.

他们之中的任何一个都足以驱使一个人变得疯狂。

I do not think either of them are at home.

我认为他们两个人都不会在家。

请注意,当neither表示“亦不”涵义时,其后的主谓语往往要倒装。例:

You did not see her,neither did I.

你没有看见她,我亦未看见她。

You will not go to Macau,I neither will I.

你不想去澳门,我也不想去。

顺带一提,以上两句中的neither did I/neither will I 可说成nor did I/nor will I或and I didn't either/and I won't either.
1.will,would,shall作为情态动词时的用法
will:1.构成一般将来时e.g:I will go to bed.
2.表达委婉的询问语气e.g:Will you please close the door?
would:1.表委婉语气(可与will互换):e.g:Would you please close the door?
2.表愿望或请求:I would like to do that。
shall:1.构成一般将来时,用于第一人称e.g:I shall go to the bed.
2.Shall用于第二、第三人称,表示说话人给对方命令、警告、允诺或威胁。e.g:You shall fail if you don't work harder. (警告)
He shall have the book when I finish reading. (允诺)
He shall be punished. (威胁)
3.建议:e.g:Shall we go to the park.
2.can have done 的意思
本可以...。表示一已经做完的事,含有一种抱怨的意义
e.g:You can have eaten it.
3.can be 能表示推测吗
不可以。表推测时,英语中只使用must,may,might,may not和can't。这五个表达的语气依次递减:
must:一定(语气肯定)
may:也许(不很肯定)
might:或许(比may语气更弱)
may not:也许不(表否定)
can't:一定不(must的反义)
推测现在的事情用must,may,might,may not和can't+do或be
e.g.She must be at home now.
The boy may play now.
推测过去的事情用must,may,might,may not和can't+have done
e.g.She might have been ill yesterday.
He must have hold the party.
注意:表推测的must,may,might,may not和can't是不可以与I think...连用。因为I think...已有推测的含义,故不能连用
4.would like to,should like to什么意思
would like to指想要做某事。同义词是want和feel like doing
至于should like to根本没有这种用法
5.By no means________misunderstand you
A.could we B.shall we
C.we shall D.we can
答案是A 为什么B不可以?
shall we表示的是疑问语气。这里是将状语提前,所以要倒装,将情态动词提前。实际上可以说成We could misunderstand you by no means.
6.I knew that if I wasn't able to avoid a mistake,chances were that no other doctor________,either.
A.should have been B.could have been
C.ought to have been D.must have been
答案是B 为什么??? 顺便解释下句子的意思.
这里could have been是在虚拟语气中使用的。有机会
意思是我知道假如我不能承受一个错误,其他医生都没有机会的。

我也是学生

1,不清楚

2,可能是需要做完某事

3,should be和could be才表推测

4,也不清楚

5,还是不清楚

6,完全不清楚

- -,我尽力了


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