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
eg.I ran into the classroom as soon as the bell rang.
特殊引导词：wherever, anywhere, everywhere
eg. Wherever the sea is , you will find seamen.
常用引导词：because=in that, since=now that, as, for
特殊引导词：seeing that, now that, in that, considering that, given that
eg. I "m late because I didn"t caught the bus.
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, for the purpose that, to the end that
eg. You should book the hotel in advance so that the travel will be more easy.
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
eg. He is so young that he can"t have meal by himself.
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
eg. You can go to London as long as you have passport.
常用引导词：though, although, even if, even though
特殊引导词： as(用在让步状语从句中必须要倒装)，while，no matter …， in spite of the fact that, whatever, whoever, wherever, whenever, however, whichever, as if=as though
eg. Though we are old, we still can do these by ourselves.
特殊引导词：the more … the more … ; just as …， so…,no … more than; not A so much as B
eg. She is as pretty as her mother.
常用引导词：as, as if, how
eg. He didn"t so it the way his brother did.