连词语法

并列连词
表示意义的引申: and, both…and, not only…but(also), as well as, and …as well, neither…nor
表示选择: or, either…or
表示转折: but, while, whereas, yet, however/nevertheless(也可认为是副词)
表示因果: for, so, therefore, hence
从属连词
表示时间: when, while, as, after, before, since, until(till), as soon as, once
表示原因: because, as, since, now that, seeing that
表示条件: if, unless, in case, provided(that), suppose, as long as, on condition (that),
表示其他关系: (al)though, than, as/so…as, lest, in order that, so…that