在句子中作状语的从句叫状语从句。状语从句可以表示地点、时间、原因、条件、目的、结果、让步、比较等,一般由从属连词引导。一、时间状语从句表示时间的状语从句一般由when,while,as,since,after,before,as soon as,till,until等引导。值得注意的是,当主句是将来时的时候,从句用一般现在时。 In the sentence as an adverbial clause adverbial clause. Adverbial clause can mean place, time, reason, condition, purpose, result, concession, comparison, etc., usually guided by subordinate conjunctions. First, the time adverbial clause that adverbial clause of time generally from when, while, as, since, after, before, as soon as, till, until and so on. It is noteworthy that when the main clause is the future when the clause with the general present.