As的用法小结
as可以作连词、介词及关系代词和副词。现将其用法小结如下: （一）、 as作连词的用法:
1.作“在-------期间，当----的时候”引导时间状语从句.注意与when、 while的用法区别。 ①下列情形时,只用as, 而不用when或while。
1)用于表示同一个人的两种动作交替进行,指一边----一边. 如: The girl sings as she goes to school.
He looked behind occasionally as he went forward in the forest. 2)表示两个同步发生的动作或行为,意思是随着-----的发展.如: As time went on / by, she became more and more beautiful .
As children get older, they become more and more interested in everything.
3)表示两个短暂行为或事情几乎同时发生.如:I watched her as she read the book. I thought of it just as you opened your mouth.
Just as the flying worm hit her face, she gave a loud cry. 4)接在名词后面表示某一个年龄段时.如: As a young man, he was active in sports.
②when作\当??的时候\解,可以指较短的(一点)时间,也可指一段时间。如:When I was at college, I could speak several foreign languages. When the clock struck twelve, I had slept for 2hours.
③ while常表示一段较长的时间或一个过程,强调主句谓语动词与从句谓语动词同时发生。如:Work while you work. Play while you play.
2. As =Since 作\既然\、\由于\解,引导原因状语从句,常用来表示已为人们所知或显而易见的原因或理由。如: As he’s been ill for ages, I will help him. As / Since you’re not feeling well, you may stay at home. As he wasn’t ready , we went without him.
3. As =in the way that作\像\、\按照??的方式\解,引导方式状语从句。如: Do as I told you.
Remember, you must do everything as I do.
4. 用于as--- as或not / so/ as ---- as中,前一个as是副词,后一个as是连词,引导比较状语从句。如:They helped the old as much as possible. I don’t speak English so/ as well as she does.
5. 表示虽然,尽管 等,引导让步状语从句,常用倒装语序,模式为:
adj. /adv. / n.+as +主语+谓语+主句。如: Young as he is, he knows much. Tired as they were, they walked on.
6. 表示也------一样。 She is a doctor, as was her husband. （二）、 as作关系代词,引导定语从句,表示正如,这一点.如: He is very careful, as we all know.
As is well-known, Taiwan belongs to China.
另外,当先行词被the same, such等词修饰时,常用as来引导定语从句。如: Such a clever girl as she can learn anything quickly. I was reading the same book as he bought yesterday.
（三）、as作介词的用法.
1.表示好像。如:He dressed as a policeman. 2. 表示作为当作。如：I found a job as a guide.
3. 当某人是某身份时。如：As a child , she was sent to abroad.
4. as引导的介词短语大多用作状语,as译为\作为\少数情况可引起宾语补足语。如: As a Party member, I’ll take the lead in everything. (状语) She works as a model. (状语)
She has me as one of her best friends.(引起宾语补足语) （四）、作副词的用法 1 表示与------等同。如：This dress is twice as expensive as that one. 2 像，如等。如：As before, he remained unmoved.
总之，通过以上的分析，我们对as的词性和用法有了比较全面的理解和把握，才能在实际的运用中做到心中有数，应付裕如。
as用法小结（高中英语总结）
1．作介词，表示“作为； 当作”。如：
As a party member, I must be strict with myself． He works in the school as a teacher of math．
2．作连词，引导方式状语从句，意为“像；按照”。 如： You must do everything as I asked you to．
3．作连词，引导时间状语从句。意为“当??的时候”。 如： She sings as she walks．
He came just as I reached the door．
4．作连词，引导原因状语从句。如：
You must hurry up as there is little time left．
5．引导让步状语从句，常用于倒装结构 。如： Hard as he worked, he didn’t pass this examination． Child as he is, he knows a lot．
6．用作关系代词，引导非限制性定语从句。如： As we all know, the earth is round．
She has been late again, as was expected．
7．用于一些固定搭配。如：
① as ．．． as．．． 与??相同的程度； 与??等同
The dress is twice as expensive as that．
② as if ／as though 似乎；好像
He behaved as if nothing had happened．
He rubbed his eyes and yawned as though waking up after a long sleep．
③ as well as 同（一样也）；和；还
On Sunday his landlady provided dinner as well as breakfast．
We cannot expect her to do the homework as well as look after the children．
④ such．．．as 像??这样的；such as 例如 I bought a lot of fruits, such as apples, oranges, bananas and so on．
Such simple actions as eating drinking become difficult．
⑤ as for 至于某人（某事物）
As for you, you ought to be ashamed of yourself． As for the hotel, it was very uncomfortable and miles away from the sea．
⑥ as to 关于某事物；提到某事物
As to correcting our homework, the teacher always makes us do it ourselves．
⑦ so as to ．．． 以便, 为了
She saved the money so as to support the family．
⑧ as a matter of fact 其实；实际上
As a matter of fact, I’m very fond of housework．
⑨ as a result 结果 (发生某种情况)
As a result， he had been given an excellent job．
⑩ as long as 只要
As long as you work hard, you will succeed sooner or later．
AS用法（六级考试总结）
在英语学习中，“as”作为一个词性多，词义广，出现频率高的词，是六级考生必须熟练掌握，并且应该能够正确加以运用的重点词汇。这里，结合例句，着重列举一些常用的，以及在考试中经常出现的短语及用法。 1． as do I ／as I do
a）He writes as his father did．他像他爸爸一样写作。
注：表示比较或方式的as从句一般使用正常语序。但是，在正式语体中，也可以采用倒装，但不是强制性的，而是选择性的。例如：
b）She looks forward ，as does her secretary ,to the completion of the building．她像她的秘书一样盼望工程竣工。
c）When in Rome do as Romans do．入乡随俗。 2．．．．as he is
a）Talented as he is，he is not yet ready to turn professional．别看他有天份，他还没把心用到专业上去。 注：这是一种表示让步的分句，主要用于正式文体。Talented as he is ＝Though he is talented，as引出的主谓语倒装是强制性的，因为若将as置于句首，就不是让步状语从句了。由though引出的让步状语从句，也可以使用这种语序，但不是强制性的。例如：
b）Coward though he is ，do not bully him．尽管他是个胆小鬼，但不要欺负他。 3．as far as ／so far as
a）So far as I know，he will be away for three months．据我所知，他将离开这里三个月。 注：当as far as和so far as作“在??范围内??、一直到、到??那么远”解时，它们是可以互换的。当表示形容词、副词同级比较时，要求在肯定句中使用as far as。例如： b）We didn\\'t go so／as far as the bridge．我们没有走到桥那么远。 4．as／so far as to do（doing）something意思是：“竟到了??程度”。
a）At last，she went so far as to bring him to the apartment．最后，她竟把他带到了公寓。 注：as／so far as之后既可跟不定式也可跟动名词。例如：
b）I have considered having a car，but I haven\\'t got so far as buying it yet．我是考虑要买一辆汽车，但是还没有到决定买的程度。 5．as follows意思是“如下的”。
a）His arguments are as follows．他的论点如下。
注：as follows是固定成语，不管引出的事物是单数还是复数，都只能用as follows（＝as it follows），而不能用as follow。例如： b）He explained it as follows ．（＝His explanation was as follows ．）他的说明如下。 6．as for／as to意思是“至于、关于”。
a）Much pasture land is under water； and as for the grain，most of which has been ruined．大部分牧场都进了水，至于谷物，大部分都被冲毁了。
注：as for在语体上不如as to正式；前者着重话题的转换，因此，它不能用于文章的开头。例如：
b）As to the question you raised in your last letter ，I think．．．．关于你上封信提出的问题，我认为??。
7．as good as意思是“差不多，几乎”。此外，该结构还保留其原意“和??一样好”。 a）Don\\'t worry，the matter \\'s as good as settled．别担心，问题差不多已经解决了。
