一、时间状语从句
连接词：when, while, as, before, after, until, since, as soon as, the moment
注意：when可接瞬间动词，while必须接延续性动词
二、原因状语从句
连接词：because, since, as, for
区别：because语气最强，回答why；since/as表示已知原因；for是并列连词，补充说明
三、条件状语从句
连接词：if, unless, as long as, on condition that, provided that
注意：主将从现（主句将来时，从句用现在时表将来）
四、让步状语从句
连接词：although, though, even though, even if, while, however
注意：although/though不能与but同用
五、目的状语从句
so that, in order that（从句常用can/could/may/might）
六、结果状语从句
so...that, such...that
七、方式状语从句
as, as if, as though
八、比较状语从句
than, as...as
九、地点状语从句
where, wherever