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1. as作连词,引状从。
1)表"当......时候",引时状从,强调两个动作同时发生,或某事一发生,另一事立即发生。
如:She sang a song as she walked. 她边走边唱着一首歌。
2)表"因为"、"由于",引原状从,与because相近。
如:I must stop writing, as I have a lot of work to do. 我必须停笔,因为我有许多工作要做。
3)表"正如"、"按照""像......一样",引方式/比较状从。
如:Run as l do. (方状从)/My brother is as tall as I am. 我弟弟和我一样高。(比较状从)
4)as经常用在as... as possible结构中,表示"尽可能地......"。
如:as quickly as possible尽可能快,as much as possible尽可能多。
5)表"尽管"、"虽然",常用于倒装句式,引让步状从。
如: Old as he was, he still worked very hard. 他虽然年龄大了,但工作还很努力。
2. as用作介词,表"充当"、"作为"。
如:As a party member, I must be strict with myself. 作为一名党员,我必须严格要求自己。
She is famous as a singer. 她作为一名歌手而闻名。
3. as构成一些固定搭配。
1)as well as 同,和......一样;
如: My parents often go for a walk after supper as well as my brother. 我父母经常晚饭后散步,我哥哥也是。
2)as soon as 一......就......
如:I will call you as soon as I get to the station. 我一到车站就会给你打电话。
3)as long as 只要
如:As long asyou don't betray me, I'll do whatever you ask me to (do). 只要你不出卖我,要我做什么我都愿意。
As 用法专练
1.It is generally believed that teaching is ____ it is a science.
A. much as an art as B. as much an art as
C.an art as much as D.as much as an art
2. _____ I admire David as a poet,I don’t like him as a man.
A.Only if B.If only
C. As much D.Much as
3. ____ ,he talks a lot about his favourite singers after class.
A.A quiet student as he may be B.Quiet student as he may be
C.Quiet as he may be a student D.As he may be a quiet student
4.I wonder why you don’t do it as ____ and it’s the third time you have done so.
A.told you B. be told
C. told to D. you told
5.( 1) ___I explain on the phone,your request will be considered at the next meeting.
(2)____ I explain on the phone is that your request will be considered at the next meeting.
A. What B.When C.After D. As
6.(1)That is ____ problem____can’t be worked out by anyof us .
(2)That is ____problem____none of us can work it out.
A.a such difficult , that B.so difficult a ,that
C.such a difficult, as D.a so difficult ,as