as

　　1、作为，当作
　　I am working as his teaching assistant. 我作为他的助教进行工作。

　　2、as…as 就像……一样
　　I’ve heard that he is as well-known as Johnson herself. 我听说他跟约翰生本人自己一样著名。
　　I don’t think it would be as boring as working in an office.我并不认为这会跟在办公室工作一样枯燥。
　　It wasn’t as easy as I had thought. 这不像我想的那么简单。
　　It’s not as bad as it looks. 这并不像看上去的那么糟糕。
　　Is that optional course as hard as everybody says?那个选修课真的就像每个人说的那样难吗？

　　3、as far as I know 据我所知
　　As far as I know, whether there’ll be such a trip is yet to be decided.
　　据我所知，是否有这么一趟旅行尚未决定。
　　As far as I know, he works until midnight every day.
　　据我所知，他每天都工作到半夜。

　　4、as well 也
　　If the weather is this hot tomorrow, we may as well give up the idea of playing tennis outside.
　　如果明天温度还是这么高，我们也可能放弃到户外进行比赛的主意。

　　5、as soon as 一……就，尽快
　　I will do that for you as soon as I have fixed the machine.
　　一修好机器我就会尽快为你完成那个工作。