Module 3 MusicSection Ⅲ Grammar 时间状语从句和过去完成时
语法图解
探究发现
①Whenhe was very young, Mozart had a lot of musical talent.
②While he was still a teenager, he was a big star.
③As he grew older, he began to go deaf.
④By the time he was 14, Mozarthad composed many pieces for the harpsichord, piano and violin, as well as for orchestras.
⑤Afterthey had known each other for many years, Beethoven said, "He is a good composer, but he has taught me nothing."
⑥Before they visited India, they had recorded seven albums.
[我的发现]
(1)以上所有例句中都包含一个时间状语从句。
(2)例句④⑤⑥都包含了一般过去时或过去完成时。
(3)例句①②中,when和while都表示"当......时候",例句③中as表示"随着"。
(4)例句④⑥中,by the time和before引导时间状语从句,从句用一般过去时,主句则用过去完成时。
(5)例句⑤中,after引导时间状语从句,主句用一般过去时,从句用过去完成时。
一、时间状语从句
时间状语从句用来说明主句谓语动词发生的时间,由连词引导。本单元主要学习when, while, as及by the time引导的时间状语从句。