引导状语从句的词语叫从属连词。不同作用的状语从句通常由不同的从属连词来引导。如：

(1) 引导时间状语从句的从属连词主要有when, while, as, whenever, before, after, since, until, till, as soon as, the moment, the minute, the second, the instant, immediately, directly, instantly, once等。

(2) 引导条件状语从句的从属连词主要有if, unless, as [so] long as, in case 等。

(3) 引导目的状语从句的从属连词主要有 in order that, so that, in case, for fear等。

(4) 引导结果状语从句的从属连词主要有so that, so…that, such…that等。

(5) 引导原因状语从句的从属连词主要有because, as, since, seeing (that), now (that), considering (that) 等。

(6) 引导让步状语从句的从属连词主要有although, though, even though, even if, while, however, whatever, whoever, whenever, wherever等。

(7) 引导方式状语从句的从属连词主要有as, like, as if, as though, the way等。

(8) 引导地点状语从句的从属连词主要有where, wherever, everywhere等。

(9) 引导比较状语从句的从属连词主要有than和as…as。