as前后时态

连接词 conj.
1.像...一样;依照;像
You ought to do as Paul tells you.
你应按照保罗吩咐的做.
The work is not so difficult as you imagine.
这工作不像你想像的那么困难.
2.当...时
As she left the room she remembered that book.
她离开房间时想起了那本书.
3.随着
As the sun rose the fog dispersed.
太阳一出来,雾随之消失.
4.因为
We didn't know what to do as we were just visiting there.
我们不知道该怎么办,因为当时我们仅仅在那里作访问.
5.虽然
Tired as he was, he sat up late.
他虽然疲倦,可仍然很晚才睡.
你看一下网上词典中的例句,或许有帮助