状语从句一般分为九种，它们是：时间状语从句；地点状语从句；原因状语从句；条件状语从句；目的状语从句；结果状语从句；方式状语从句；让步状语从句；比较状语从句。
一、时间状语从句；地点状语从句；原因状语从句；条件状语从句
[观察例句]
1．We should go where the Party needs us most.
2．The last time she saw James，he was lying in bed.
3．If you see him，give him this note.
4．It will not be long before we meet again.
5．I have written home four times since I came here.
6．Now that everybody is here，let's begin our meeting.
