Simone
1.引导限制性定语从句和非限制性定语从句
（1）as多与such 或the same连用,可以代替先行词是人或物的名词.
（2）as 也可单独使用,引导非限制性定语从句,作用相当于which.例如：
The elephant’s nose is like a snake,as anybody can see.
（3）the same… that与 the same …as在意思上是不同的.
2．As引导的非限制性定语从句的位置
as引导的非限制性定语从句位置较灵活,可以位于主句前面．中间或后面,一般用逗号与主句隔开,但which所引导的非限制性定语从句只能放在主句之后.例如：
(1) As is expected,the England team won the football match.
(2) The earth runs around the sun,as is known by everyone.
连接词conj.
1. 像...一样；依照；像 例如:You ought to do as Paul tells you. 你应按照保罗吩咐的做。
2. 当...时 例如:As she was leaving the room she remembered that book. 她离开房间时想起了
那本书。
3. 随着 例如链族旅:As the sun rose the fog dispersed. 太阳一出来,雾随之消失。
4. 因为 例如:We didn't know what to do as we were just visiting there. 我们不知棚凳道该
怎么办，因为当时我们仅仅在那里作访问。
5. 虽然穗帆 例如:Tired as he was, he stayed up late. 他虽然疲倦，可仍然很晚才睡。
6.尽管 例如：Try as she might,Sue couldn't get the door open.尽管想尽一切办法，苏还是不能打开那扇门
