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《Learning about Language》公开课PPT课件优质课下载
保持原状不要动它。
[表示时间]当…的时候，一边…一边，随着
She sang as she worked.
她一边工作一边唱歌。
I saw him as he was getting off the
bus.
正当他下公共汽车时我看见了他。
[表示原因]因为，既然
As you are tired , you had better rest.
（既然）你累了，最好休息一下。
You can go first as you're the oldest.
因为你最年长，所以你优先。
[引导定语从句]正如，正像
As is well-known , Taiwan belongs to
China.众所周知，台湾属于中国。
He is from the south, as we can see
from his accent. 他从南方来，从他的
口音我们可以看出。
[作介词]作为
I found a job as a guide.
我找了一个做导游的工作。
We had better treat it as a joke.
我们最好把它当作玩笑