2020天津公安消防考军校考试：语法总结（12）

　　Ⅲ. 关系副词引导的定语从句:

　　●When 指时间，在定语从句中作时间状语。其先行词是表时间的名词(如：time, day, week, tear, month, etc.)

　　He came last night when I was out.

　　We will put off the picnic until next week, when the weather would be better.

　　注意：先行词为"时间名词"，可用when引导定语从句，when在定语从句中作状语;还可以用which或that 引导，which或that在从句中作主语或宾语。

　　比较: I still remember the day when /on which my brother joined the army.(作状语)

　　Next month, when you will be in your hometown, is just around the corner.

　　I still remember the days which/that we spent together. (作宾语)

　　Next winter which/that you'll spend in Harbin, I'm sure, will be exciting.

　　I shall never forget the day when Shen Zhou Ⅴ was launched, which has a great effect on my life.

　　There are occasions when joking is not permissible.