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一.四大条件状语从句
1 时间状语从句 【adverbial clause of time】:
Ø 常用引导词:When, while, as, after, before, as soon as, since, till
2 原因状语从句 【adverbial clause of cause】:
Ø 常用引导词:because, since, as, for
Ø 特殊引导词:seeing that, now that, in that, considering that
3 条件状语从句 【adverbial clause of condition】
Ø 常用引导词:if, unless,
Ø 特殊引导词:as/so long as, only if, providing/provided that, supposing that, in case that, on condition that
4 让步状语从句 【adverbial clause of concession】
Ø 常用引导词:though, although, even if, even though
Ø 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, while, whatever, whoever, wherever, whenever, however, whichever