as语法小结_语法小结

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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.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.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 dreed as a policeman.2.表示作为当作。如：I found a job as a guide.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 dre is twice as expensive as that one.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 pa 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．