状语从句指句子用作状语时,起副词作用的句子
它可以修饰谓语、非谓语动词、定语、状语或整个句子
根据其作用可分为时间、地点、原因、条件、目的、结果、让步、方式和比较等从句
状语从句一般由连词(从属连词)引导,也可以由词组引起
从句位于句首或句中时通常用逗号与主句隔开,位于句尾时可以不用逗号隔开
一、时间状语从句 要点: 时间状语从句,由以下连词引导: when while as after before as soon as since till /until by the time 在时间状语从句中,要注意时态一致
一般情况下主句是将来时的时候,从句要用一般现在时
when 当
的时候 mozart started writing music when he was four years old
(当)莫扎特的时候,开始写音乐作品
while 当
时 he visited a lot of places while he was traveling
他在旅途中参观了许多地方
的同时;一边
he smiled as he stood up
他一边站起来一边笑着
after 在
之后 he left the classroom after he had finished his homework the other day
前几天做完作业之后回的家
before 在
brown had worked in a bank for a year before he came here
布朗先生来这之前已经在一家银行里工作一年了
as soon as 一
we began to work as soon as we got there
我们一到那就开始工作