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。
1.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。
2.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。