must的用法

①表示“必需”“一定”“必要性”

must是模糊限制语吗 must有禁止的意思吗must是模糊限制语吗 must有禁止的意思吗


must是模糊限制语吗 must有禁止的意思吗


1.must表主观上的必需,而he to表职责或义务,强调客观。

2.need作为情态动词用于疑问句或否定句。Need you……?的答句是Yes,I must.或No,I needn't(don't he to)对问句表示有必要做某事的肯定答语是Yes,you must/he to.否定答语是No,you needn't./don't he to/don't need to.

②表示“推测或可能性”

1.must表推测仅用在肯定句中。(must用于否定句中表禁止)在否定句和疑问句中表推测用can或could,对过去的行为动作或状态的推测用must/may/might/can't/couldn't+he done

2.may或might用于肯定句或否定句,might可能性较小

3.should(ought to)表示推测时,是指有一定根据的推测、推论或可能性

③表请求或许可

1.may用于疑问句中表示询问许可。还可用can,could,might等表许可

2.can表许可基本同may

④表能够,有能力

1.can的过去式为could,be able to do表示经过努力所具有的能力

2.如果表示在过去某一特定的时候经过努力终于做成某事,用was/were able to do sth.相当于mad to do sth,/succeeded in doing sth.

⑤表建议或征求意见

1.shall用于、三人称表征求意见或建议。

2.will的疑问句表请求,邀请

3.would表愿望、意愿、建议或看法

⑴表示强烈的愿望和意愿

⑵表示请求语气时will委婉,并不表示过去的意义。wouldn't表示请求邀请,没有否定的意思

⑶would表示意愿用在一些固定的短语中,如would like/would love to do sth.;would rather do sth.

4.had better表建议,意思是“……”强调现在或将来

5.could/might/would表示委婉的请求,肯定答语分别是can/may/will

⑥表示过去习惯做某事

1.used to do/be sth.表示过去常做某事,暗示现在已经不做了。否定形式用usedn't /didn't use

2.would do sth.不强调现在的情况,主要表示过去的倾向性动作或习惯,常与表示过去的时间状语连用,意思是“总要,总是”注意would不可表示过去的状态主要强调过去的动作,不能说would be/he……

⑦表示 敢

dare作为情态动词时表示“敢”,用于疑问句或否定句中;作为行为动词时,同其他行为动词一样用于各种句式中,跟动词不定式做宾语,在疑问句和否定句中可以省掉不定式的标志to

I dare say 是一个固定短语 意为“我认为,我相信”

⑧表应该

should表示义务、、命令、劝告,意思是“应该”ought to表示义务、约束力,同should,的那是语气比should强,比must弱

⑨表命令,,威胁

1.shall与二、三人称连用表示命令等,表示说话者的强烈意志

2.mustn't是must的否定形式,表示“禁止、不准”是一种命令、威胁或

⑩表示惊讶、难以置信

1.should 用于疑问句中,可以表示惊讶、难以置信的事情

2.can用于疑问句或否定句可以表示惊异、不相信等感彩

您的支持就是我继续前行及帮助别人的动力 愿您与同携手传播『 爱心 』之种

望采纳↖(^ω^)↗

谁给我 英语中的 全部 连接词

.增补(Addition)

in addition,此外,

furthermore,此外,

again, 再次,

also, 同时,也

besides, 此外,

moreover, 此外,

what`s more, 今天怎么多,

similarly, 同样,

next, 跟着

finally.

2.比较(Comparison)

in the same way, 同样的方式,同时

likewise, 同样,

similarly, 同样,

equally, 同样,

in comparison, 相比之下,

just as正如

3.对照(Contrast)

whereas, 然而,

in contrast, 相比之下

on the other hand, 在另一方面,

instead, 相反

howr, 然而,

nrtheless, 然而,

unlike, 不同的是,

n though, 虽然,

on the contrary, 相反,

while而

4.因果(Cause and effect)

because, 因为,

because of, 因为,

for, since, 因为,

due to, owing to, 由于

thanks to, 感谢,

as a result(of), 作为一个结果

accordingly, 据此,

hence, 因此,

so, 那么,所以

thus 从而

5.强调(Emphasis)

certainly, 当然,

above all, 首先,

indeed, 的确,

of course, 当然,

surely, 当然,

actually, 实际上,

as a matter of fact, 因为事实上,

chiefly, 主要是,

especially, 特别是,

primarily, 主要是,

in particular, 特别是,

undoubtedly, 毫无疑问,

absoluy, ,

most important最重要的

6.让步(Concession)

although, 虽然,

though, 不过,

after all, 毕竟,

in spite of, 尽管,

nrtheless, 然而,

still, 还有,

provided, 提供

while it is true....而这是真的....

7.例证(Exemplification)

for example, 例如,

for instance, 例如,

that is, 也就是说,

namely, 即:

such as, 例如,

in other words, 换句话说,

in this case, 在这种情况下,

by way of illustration.通过举例的方式。

8.总结(Conclusion)

to sum up, 概括地说,

to conclude, 到,

in a word, 总之,

in short, 总之,

in brief, 简单地说,

all in all, 总而言之,

in all, 总之,

to put it in a nutshell, 概括地说,

in summary简易地说

9.推断(Inference)

therefore,因此

as a result(of),作为一个结果

consequently,因此

accordingly,相应地

so,因此

otherwise否则

10.时间和空间(Time and space)

afterward,后来

after,之后

first,首先

later,后来

then,然后

soon,不久

outside,外面

near,附近

beyond,超越

above,上面

below,下面

on the right(left),在右边(左边)

in the middle,在中间

opite,相反

in front of在后面

11.启承转合

1)、启

A proverb says...... At present.......

谚语说......目前.......

As the proverb says.... Currently.....

正如谚语说....目前..

Generally speaking, .... Now,....

一般来说,....现在,....

In general, ..... On the Whole....

在一般情况下,.....总的来说....

It is clear that.... Recently.....

很显然,....最近.....

It is often said that.... Without doubt, .......

人们常常说....毫无疑问,.......

2)、承

First(of all), ...... Moreover, .........

(所有),......此外,.........

Firstly, ............ No one can deny that....

首先,............没有人能否认....

In the first place, ......... Obviously.....

首先,.........显然.....

To begin with, ......... Of course, .........

首先,.........当然,.........

Also, ....... Similarly,.........

此外,.......同样,.........

At the same time...... Therefore, we should realize that.....

同时......因此,我们应该认识到.....

Certainly...... There is no doubt that.......

当然......毫无疑问,.......

In addition,..... What`s more, ..........

此外,.....今天怎么多,..........

In fact........ It can be easily proved that...

事实上........它可以很容易地证明,...

Meanwhile......

与此同时......

3)、转

But... Still, ......

但是...不过......

But the problem is not so ...

但问题并非如此简单...

There is a certain amount of truth in this, but we still he a problem with regard to.......

有一定的真理在这个数额,但我们仍然有一个问题就.......

Howr,然而,

....... To our surprise,..........

.......让我们惊讶的,..........

Nrtheless, ........ Unfortunay.......

不过,........可惜.......

On the other hand, .......

另一方面,.......

Yet difference will be found and that is why I feel that........

然而,异会被发现,这就是为什么我觉得.......

Others may find this to be true, but I do not. I think.....

其他人可能会发现这是真的,但是我不知道。我觉得.....

4)、合

Above all, In brief, ........

首先,简单来说,........

Accordingly, ..... In conclusion, ........

因此,.....总之,........

All in all, .......

总之,.......

In other words, it is hard to escape the conclusion that........

换句话说,它是很难逃脱这样的结论........

As a consequence, ......... In short, .........

因此,.........总之,.........

As I he shown/said/stated/.... In sum, ........

正如我表明/说/....总之,........

In summary, ....... As has been noted, ....

总之,.......正如已经指出的那样,....

On the whole, ..... Consequently, ........

整体而言,.....因此,........

Presumably, ....... Eventually, .........

据推测,.......,.........

To conclude, ...... Finally, ........

总括而言,......,........

To sum up, ..... In a word, ......

总之,.....总之,......

To summarize, ......

总之,......

英语中的连接词

一、 顺序

At first, first, firstly,second,secondly,then,next,ntually(终于,),in the end,

lastly,subsequently(后来,随后),at the same time, simultaneously (同时地),

afterwards ,finally,last but not least(但并非最不重要的一点)

二、 补充

And,in addition,morr,besides,above all ,further,furthermore,not only…but also,

What is more,,in the same way(同样地)

三、 比较

Likewise(同样地),equally(相等地,同等地),similarly(相似地,类似地),in comparison(相比之下),correspondingly(相对地),in the same way

四、 对比

But, howr,whereas(但是),conversely(相反地),in contrast(相比之下),unlike,on the contrary,on the other hand, yet(然而,但是)

五、 让步

Howr,nrtheless(尽管如此,然而),n though,still, yet

六、 提出可选项

Alternatively(作为选择,二者择一地),on the other hand, rather

七、 因果

Consequently,so, accordingly(因此,于是),as a result,for this reason,hence(因此),

thus,owing to(由于)this/that, due to this/that,therefor,with this in mind(牢记这一点),under the circumstances(在这种情况下)

八、举例

For example,that is ,such as, for instance, thus,as follows, in this case(既然这样)

九、提出新观点

With regard to (关于,至于),in regard to ,with reference to, turning to

十、模糊限制语

On the whole(大体上,总的来看/说),in most cases(大多数情况下)

十一、(情感)交际

Certainly(无疑地),needless to say (不必说),strangly enough (说也奇怪)

十二、强调

Notably(显然地),in particular(尤其,特别),particularly

十三、总结

In conclusion,to conclude, finally, to sum up, in brief(简而言之),therefore(由此得出)

十四、条件

otherwise(否则,要不然),under the circumstances, ifso ,if not,in that case,otherwise

关于can must区别

giao...

must是命令的语气,can稍弱

用must,表示肯定推测语气强,can多用于否定

您好

must,can be一般不用做推测,can't be多用于否定推测

是 must

情态动词:can may must的用法

情态动词有can (could), may (might), must, he to, shall (should, will (would), dare (dared), need (needed), ought to等。 情态动词无人称和数的变化;不能单独使用,必须与其后的动词原形构成谓语

情态动词有can (could), may (might), must, he to, shall (should, will (would), dare (dared), need (needed), ought to等。 情态动词无人称和数的变化;不能单独使用,必须与其后的动词原形构成谓语

一、 can, could

1) 表示能力(体力、知识、技能)。

Can you lift this hey box?(体力)

Mary can speak three languages.(知识)

Can you skate?(技能)

此时可用be able to代替。Can只有一般现在时和一般过去式;而be able to则有更多的时态。

I’ll not be able to come this afternoon.

当表示“经过努力才得以做成功某事”时应用be able to,不能用Can。如:

He was able to go to the party yesterday ning in spite of the hey rain.

2) 表示请求和允许。

-----Can I go now?

----- Yes, you can. / No, you can’t.

此时可与may互换。在疑问句中还可用could,

might代替,不是过去式,只是语气更委婉,不能用于肯定句和答语中。

---- Could I come to see you tomorrow?

---- Yes, you can. ( No, I’m afraid not. )

3) 表示客观可能性(客观原因形成的能力)。

They’ve changed the timetable, so we can go by bus instead.

This hall can hold 500 people at least.

4) 表示推测(惊讶、怀疑、不相信的态度),用于疑问句、否定句和感叹句中。

Can this be true?

This can’t be done by him.

How can this be true?

二、 may, might

1) 表示请求和允许。might比 may语气更委婉,而不是过去式。否定回答时可用can’t

或mustn’t,表示“不可以,禁止”。

----Might/ May I oke in this room?

---- No, you mustn’t.

---- May/Might I take this book out of the room?

---- Yes, you can. (No, you can’t / mustn’t. )

用May I...?征徇对方许可时比较正式和客气,而用Can I...?在口语中更常见。

2)用于祈使句,表示祝愿。

May you succeed!

3) 表示推测、可能性(不用于疑问句)。

might不是过去式,它所表示的可能性比may小。

1.He may /might be very busy now.

2.Your mother may /might not know the truth.

三、 must, he to

1) 表示必须、必要。

You must come in time.

在回答引出的问句时,如果是否定的,不能用mustn’t(禁止,不准),而用needn’t, don’t he to(不必).

---- Must we hand in our exercise books today?

---- Yes, you must.

---- No, you don’t he to / you needn’t.

2) must是说话人的主观看法, 而he to则强调客观需要。Must只有一般现在时, he to 有更多的时态形式。

1. he play isn’t interesting, I really must go now.

2. I had to work when I was your age.

3) 表示推测、可能性(只用于肯定的陈述句)

1. You’re Tom’s good friend, so you must know what he likes best.

2. Your mother must be waiting for you now.

四、 dare, need

1) dare作情态动词用时, 常用于疑问句、否定句和条件从句中, 过去式形式为dared。

1. How dare you say I’m unfair?

2. He daren’t speak English before such a crowd, dare he?

3. If we dared not go there that day, we couldn’t get the beautiful flowers.

2) need 作情态动词用时, 常用于疑问句、否定句。在肯定句中一般用must, he to, ought to, should代替。

1.You needn’t come so early.

2. ---- Need I finish the work today?

---- Yes, you must. / No, you needn’t.

3) dare和 need作实义动词用时, 有人称、时态和数的变化。在肯定句中,dare后面常接带to的不定式。在疑问句和否定句中,dare后面可接带to或不带to的不定式。而need后面只能接带to的不定式。

1. I dare to swim across this river.

2. He doesn’t dare (to) answer.

3. He needs to finish his homework today.

五、 shall, should

1) shall 用于人称,征求对方的意见。

What shall we do this ning?

2) shall 用于第二、三人称,表示说话人给对方的命令、、允诺或威胁。

1. You shall fail if you don’t work hard.()

2. He shall he the book when I finish it.(允诺)

3. He shall be punished.(威胁)

六、 will, would

1) 表示请求、建议等,would更委婉。

Will / Would you pass me the ball, please?

2) 表示意志、愿望和决心。

1. I will nr do that again.

2. They asked him if he would go abroad.

3) would表示过去反复发生的动作或某种倾向。would表示过去习惯时比used to正式,且没有“现已无此习惯”的含义。

1. During the vacation, he would visit me ry other day.

2. The wound would not heal.

4) 表示估计和猜想。

It would be about ten o’clock when she left home.

七、 should, ought to

1) should, ought to表示“应该”,ought to表示义务或,比should语气重。

1. I should her because she is in trouble.

2. You ought to take care of the baby.

2) 表示劝告、建议和命令。should, ought to可通用,但在疑问句中常用should。

1. You should / ought to go to class right away.

2. Should I open the window?

3) 表示推测

should , ought to (客观推测), must(主观推测)。

1.He must be home by now. (断定他已到家)

2.He ought to/should be home by now.(不太肯定)

3. This is where the oil must be.(直爽)

4. This is where the oil ought to/should be.(含蓄)

八、 情态动词+不定式完成式(he done)

1) can / could + he done在肯定句中表示“本来可以做而实际上能做某事”,是虚拟语气;在疑问句或否定句中表示对过去行为的怀疑或不肯定, 表示推测。

1. You could he done better, but you didn’t try your best. (虚拟语气)

2. He can’t he been to that town.(推测)

3. Can he he got the book?(推测)

2) may / might +不定式完成式(he done)

表示对过去行为的推测。不能用于疑问句中,没有虚拟语气的用法。Might所表示的可能性比may小。

1. He may not he finished the work .

2. If we had taken the other road, we might he arrived earlier.

3)must +不定式完成式(he done)

用于肯定句中,表示对过去行为的推测。意为“一定、想必”。其疑问、否定形式用can,can’t代替。参看1) can / could + he done表示推测。

1. You must he seen the film Titanic.

2. He must he been to Shanghai.

4)should +不定式完成式(he done)

用于肯定句中,表示对过去行为的推测。

He should he finished the work by now。

表示“本应该做而实际上没有做某事”,其否定式表示某种行为本不该发生却发生了。可以与ought to +不定式完成式(he done)互换。

1. You ought to / should he ed him. (but you didn’t.)

2. She shouldn’t he taken away my measuring tape, for I wanted to use it.

5) needn’t +不定式完成式(he done)

表示“本来不必做而实际上做了某事”。

You needn’t he watered the flowers, for it is going to rain.

6) will +不定式完成式(he done)

主要用于第二、三人称,表示对已完成的动作或事态的推测。

He will he arrived by now.

must1.必须表主观想法I

must

start

now.2。表肯定推测Tom

must

be

doing

his

homework.

can

1.表能力2表

理论

上的可能性3表允许you

can

go

home

now.4表推测

the

book

can't

be

his.

may1

表允许2表推测。

字数

受限

can may must 都是情态动词,后面加动词原形!