as用法大全17种用法（as用法大全有哪些用法）

前面我们学习了as作为介词的三大用法，as有“像......、如......”、“作为......”“比如......”三种词义，在英语中as还作连词用，有“因为......”、“当......时候”、”按照......“等词义，在句中引导原因状语从句，时间状语从句、方式状语从句、比较状语从句、让步状语从句、定语从句和伴随状语从句，这时作为连词的用法比作为介词的用法要复杂多了。但只要我们稍作细心的总结，也能全面掌握的。

1. 引导原因状语从句：表示“由于......,因为......”常置于句首。

As I’m busy,I cannot play tennis with you all morning.

因为我很忙，不能整个上午和你打网球了。

As we are young,we can’t enter the place of entertainment.

由于我们还小，不能进娱乐场所。

Tired as he was, I decided not to disturb him.

因为他累了，我就决定不打扰他了。

2. 引导时间状语从句,表示“当......时“。

He broke the glass by accident as he brushed the table.

擦桌子时他无意地把杯子弄坏了。

As we walked through the forest ,we heard some strange sounds.

穿过森林时，我们听到一些奇怪的声音。

3. 引导方式状语从句，表示”按照.......“。

The boy can always do his homework as the teacher says.

这男孩总能按照老师的要求做作业。

Students must obey the rules as the schools require.

学生必须按照学校要求遵守纪律。

4. 引导比较状语从句，用”as......as“结构表达。

You can do the job as well as she does.你可以做得跟她一样好。

Jenny didn’t use to sing so beatifully as her mother did.

过去珍妮唱歌没她妈妈好。

5. 引导让步状语从句，表示”虽然......,尽管......“,有转折的意思。

Tired as she was ,she went on doing his homework.

虽然累了，但她仍然继续做作业。

Young as he is, he k***s a lot more than other children.

他虽然小，但比其他孩子要懂得很多。

6. 引导定语语从句，置于名词后。

He is such a good girl as everyone likes.

她是大家都喜欢的好孩子。

Mr. Li bought the s**e mobile phoneas I did.李先生买的***我的一样。

As we e**ected, he got the first place again .

正如我们所预料的那样，他又得了第一名。

7. 引导表伴随状语从句，表示”随着......“.

As time passed, he seemed to get worse.

随着时间的推移，他似乎变得更糟了。

As the environment gets better,more and more birds have appeared in our city.

随着环境的改善，越来越多的鸟出现在我们的城市中。