As還可引導(dǎo)時間狀語從句,“當,隨著”：
例如：As the weather is colder and colder,the leaves of the tree is less and less.
As還可引導(dǎo)方式狀語從句,“按照”：
例如：You must do the work as I have told you.
As還可引導(dǎo)讓步狀語從句.“盡管”。但是注意,as引導(dǎo)方式狀語從句時從句必須倒裝。而且這種倒裝和一般的倒裝不一樣。as從句的倒裝一般是把從句的表語或作狀語的`副詞提到as之前,（如果表語是一個帶有不定冠詞a或an的單數(shù)名詞,倒裝后a或an必須省略)。
例如：Though he is a little boy,he knows a lot.如果變成由AS引導(dǎo),就必須變成：
Little boy as he is,he knows a lot.
Though he works hard,he never succeed.
可變?yōu)?Hard as he works,he never succeed.