1、时间状语从句：
常用引导词：when, as, while, as soon as, before, after, since , till, until
特殊引导词：the minute, the moment, the second, every time, the day，the instant, immediately , directly, no sooner … than, hardly …when, scarcely … when instantly
2、地点状语从句:
常用引导词：where
特殊引导词：wherever, anywhere, everywhere
3、原因状语从句:
常用引导词：because=in that, since=now that(既然), as, for(补充说明)
特殊引导词：seeing that, now that, in that, considering that, given that（考虑到）
4、目的状语从句：
常用引导词：so that, in order that
特殊引导词： for fear that（唯恐/生怕），in the hope that（带着..希望）, for the purpose that（带着..目的）, to the end that
5、结果状语从句：
常用引导词：so … that, such … that
特殊引导词：such that, to the degree that, to the extent that, to such a degree that
6、条件状语从句：
常用引导词：if, unless,
特殊引导词：as/so long as（只要）, only if, providing/provided that（倘若）, supposing that（倘若）, in case that（以防）, on condition that
7、让步状语从句：
常用引导词：though, although, even if, even though（即使）
特殊引导词： as(用在让步状语从句中必须要倒装)，while ( 一般用在句首 )，no matter …， in spite of the fact that, whatever, whoever, wherever, whenever, however, whichever, as if=as though（仿佛）
8、比较状语从句：
常用引导词：as(同级比较), than(不同程度的比较)
特殊引导词：the more … the more … ; just as …， so…;
A is to B what /as X is to Y（A对B来说，像X对Y一样）;
no … more than; not A so much as B
9、方式状语从句：
常用引导词：as, as if, how
特殊引导词：the way
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