一、连词的分类1.并列连词并列连词用来连接平行的词、词组和分句、句子。如:and,but,or,nor,so,therefore,yet,however,for,hence,as well as,both...and,not only...but also,either...or,neither...nor,(and)then等。2.从属连词从属连词用来引导复合句。如引导时间状语从句的从属连词有:when,while,as,after,before,since,until(till),as soon as,once等。引导条件状语从句的从属连词有:if,unless,in case,as(so)long as,on condition(that)等。引导让步状语从句的从属 First, the classification of conjunctions 1. Parallel conjunctions conjunctions conjunctions used to connect parallel words, phrases and clauses, sentences. Such as: and, but, or, nor, so, yet, however, for, hence, as well as, both ... and not only ... but also, either ... or, neither ... nor, (and) then and so on. 2. Subordinate conjunctions Subordinate conjunctions used to guide the compound sentence. Such as the boot time adverbial adverbial clauses are: when, while, as, after, before, since, until (till), as soon as, once and so on. The leading conjunctions of the adverbial clause are: if, unless, in case, as (so) long as, on condition (that) and so on. Guide subordination of adverbs