有关as作连词的用法
as作为连词可以引导状语从句，表示时间、原因、方式、让步等。
1. 引导时间状语从句，意思是“当``````的时候”，同when/while,更强调“建行手机银行注销一边``````一边``````”。表“随着``````”的意思时同with,但with是介词，不可以跟从句。
eg: I saw him as he was getting off the bus.
He often listens to the music as he is doing his homework.
As time goes by, his illness is getting worse.
2. 引导原因状语从句，同since。
eg: We had better hurry as it is getting dark.
As she has no car, she can’t get there easily.
有关as作连词的用法
一．二．as引导定语从句
风雨无阻歌词1. as引导限制性定语从句。
as作为关系代词可以引导限制性定语从句，通常与the same或such连用，构成the same
``````as和such``````as句型。
eg: I have never heard such stories as he tells.
This is the same dictionary as I lost.
有关as作连词的用法
要用倒装结构。可以把从句中表语、状语甚至谓语动词置于句首，如果是带有冠词的可数名词单数作表语，置于句首时应省去冠词。
eg: Young as he is, he knows a lot about history.
Much as I like you, I will not marry you.
Try as she might, Mary couldn’t get the door open.
Boy as he is, he is very shy. (boy前省略冠词a)
4. 引导方式状语从句，表示方式。意思是“像，按照，如同”。
eg: Do it as I do it.
You should finish your task as you are told to.
Leave it as it is.
有关as作连词的用法
2. as引导非限制性定语从句。
as与which一样都可以引导非限制性定语从句，但是as引导的从句可以放在主句之前、主句之后，甚至还可以分割主句；而which引导的非限制性定语从句只能放在主句之后。
另外as还有“正如、就像”之意。
eg: As is mentioned above, the number of the students in senior high schools is increasing.
He was admitted to college, which made his parents very happy.
John, as you know, is a writer.
动词不定式
动词不定式是非谓语动词的一种，它没有人称和数的变化，在句子中不能独立作谓语，但它仍保持动词的特点，既可以有自己的宾语和状语。
动词不定式 的构成：
to+动词原形
动词不定式作主语
动词不定式作主语时句子有以下两种
(1)把不定式置于句首。如：
To get there by bike will take us half an hour.
(2)用it作形式主语，把真正的主语不定式置于句后
It will take us half an hour to get there by bike.
常用句式有
①It＋be＋名词＋to do
It‘s our duty to take good care of the old.
②It takes sb+some time+to do
How long did it take you to finish the work?
③It＋be庄巧涵献b门＋形容词＋for sb＋to do
It is difficult for us to finish writing the composition in a quarter of an hour.
④It seems＋形容词＋to do
It seemed impossible to save money
动词不定式作宾语
●后面能接不定式作宾语的动词有：agree, ask, choose, decide, forget, hope, learn, want, wish, would like等。如：
We hope to get there before dark. 我们希望天黑以前到那儿。
The girl decided to do it herself. 那个姑娘决定自己做那件事。
动词不定式作宾语的注意事项（2点）
1．有些动词既可跟不定式作宾语，也可跟动名词作宾语，但含义不同：
remember to do 记住要做某事；remember doing 记得曾经做过某事
forget to do忘记要做某事 forget doing 忘记曾经做过某事
stop to do 停下来去做某事 stop doing 停止做某事
go on to do 继续做另一件事 go on doing 继续做原来在做的事
I remember seeing you somewhere before.
一尺我记得以前在哪儿见过你。
Please remember to turn off the light when you leave.
离开时请记得关好灯。
2．不定式作宾语时，如带有宾语补足语，则要把不定式放到后面，用it作形式宾语，构成“主语+动词+it+宾补（形容词、名词）+不定式”结构。如：
He found it very difficult to get to sleep.
他发现很难入睡。
动词不定式作宾语补足语
1．后面能接to不定式作宾语补足语的动词有：ask, order, teach, tell, want, wish, help等。
The teacher told us to do Exercise 1.
老师要我们做练习一。
I want both of you to go.
我要你们俩去。
We helped her (to) repair her bike.
我们帮助她修理自行车。
2．使役动词let, have, make及感官动词see, watch, notice, hear, feel等要以不带to的不定式作宾补。
Let’s have a rest. 我们休息一会吧。
I saw him come in. 我看见他进来了。
感官动词后既可跟不带to的不定式作宾补，也可跟v-ing作宾补，前者表示动作的全部过程已结束；后者表示动作正在进行。
I saw him come downstairs.我看见他下了楼。（说明他下楼了这件事）
I saw him coming downstairs.我看见他在下楼。（说明他下楼时的情景）
动词不定式作定语
1、不定时要放在所修饰的名词、代词之后。Would you like something to eat?
He has a important meeting to have.
2、如果动名词与所修饰的名词与代词之间构成逻辑上的动宾关系，因此若不定式的动词是不及物动词时要加上相应的介词
They want a big room to live in.
动词不定式作表语
动词不定式作表语的语法功能，在初中阶段不作为考查项目，但是往往会在完形填空或阅读理解中出现，所以对此有多了解会有助于你的阅读能力。
邱行湘动词不定式放在系动词之后作表语；
My job is to clean the street every day.
His dream Is to be a doctor
动词不定式作状语
1. 作目的状语
He ran fast to catch the first bus.
He came here only to say goodbye to us.
2. 作结果状语
He searched the room to find nothing.
3. 作原因状语
I’m glad to see you.
特殊疑问词与动词不定式连用
特殊疑问词＋To do 往往与宾语从句相互转
I don’t know what to do.
=I don’ t know what I should do.
类似的疑问词还有
when, where, whom, which, how
曲炜周易网动词不定式的否定形式
●动词不定式的否定式是在to前加not；不带to的不定式则在动词前加not. 如：
Zhang Ming asked me not to stay at home all day.
张明要我不要整天呆在家里。
My mother let me not do it by myself.
妈妈让我不要独自做这件事。
To 的几种常见用法
●too…to… / not +adj.+enough to do…
He is too careless to finish the work well.
He is not careful enough to finish the work well.
He is so careless that he couldn't finish it well.
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