精选优质文档-倾情为你奉上状语从句详解及练习题附答案1 时间状语从句:在一个句子中作时间状语的句子。时间状语的连接词:when(当时候) while(当时候) as(当时候) after(在以后) before(在以前) as soon as(一就) since(自从到现在) till /until(直到才) by the time(到为止)依旧是连接词后加陈述语序。举例:when当的时候(一般情况下主句是将来时的时候,从句要用一般现在时。)Mozart started writing music when he was four years old.2 原因状语从句:在一个句子中作原因语的句子。连接词:由连词because, since, as引导, 也可由for, now that 等词引导。举例:I didnt go to school yesterday because I was ill.3 条件状语从句连接词:if如果, unless (=if not) 除非。(让步)举例:If