as用法总结

As作为连词有三种用法：

一、表方式： 按照

例句：

1）Do as I told you.

按我说的做。

She lost it, just as I said she would.

我就说了吧，她把它丢了。

二、表原因： 由于、既然

2) As you had already known Tom, there is no need for instructions.

既然你已经认识Tom了，那就没必要介绍了。

She may need some help as she's new.

她是新来的，可能需要一些帮助。

三、表时间：当…

3）We were lying on the beach sunbathing as they were playing volleyball.

当他们在沙滩上打排球时，我们在晒太阳浴。

He sat watching her as she got ready.

他一直坐着看她准备停当。