as 形容词 as的用法总结

　　例如：

　　(1)Your pen writes as smoothly as mine.你的钢笔书写起来和我的一样流畅。

　　(2)This film is as interesting as that one.这部电影和那部电影一样有趣。

　　其否定式为not as/so+adj./adv.+as。例如：

　　This dictionary is not as/so useful as you think.这本字典不如你想象的那样有用。

　　若有修饰成分，如twice,three times,half,a quarter等，则须置于第一个as之前。例如：

　　Your bag is twice as expensive as mine.你的袋子比我的贵一倍。

　　2、as引导时间状语从句

　　此时，as译作“当……时候”，可以放在主句之前，也可以放在主句之后。例如：

　　He smiled as he said goodbye to me.

　　他向我道别时微笑了一下。

　　As she was walking in the park,she heard a girl singing.

　　她在公园里散步时，听到一位女孩在唱歌。

　　I sang an English song as I went along the river.

　　我边沿河边走边唱英文歌。