21 关系副词when的用法 Track 021
（1）先行词指时间
when引导限制性和非限制性定语从句，其先行词须是表示时间的名词，如day，year，time等。when可用“时间介词+ which”来替换。
例句
a. I’ll never forget the day when I met you.
b. I’ll never forget the day on which I met you.
c. April Fool’s Day is that special day of the year when you should play a joke on someone! Children’s favorites are to put salt in the sugar bowl for Dad’s morning coffee or put chalk on a desk chair at school so the teacher gets a white backside! But remember, if you play a joke after 12 noon, YOU are the April Fool!
d. We will put off the outing until next week, when we won’t be so busy.
e. March 10, 1876 was the day when（= on which） the first complete sentence was sent over a telephone.
f.The day may soon come when we don’t bother to go to office but just work at home.
（2）关系副词when在从句中作时间状语
注意：表示时间的先行名词，若其定语从句不是缺状语，而是缺主语或宾语，关系词要用which或that。因为用when来引导定语从句的前提条件是：when在其所引导的定语从句中作时间状语。
例句
a. The day, which began brightly, ended with a violent storm.
那天开始的时候还是晴空万里，后来却下起了暴风雨。（which作主语）
b. I’ll never forget the time which I spent on campus.（which作spent的宾语）
c. I’ll never forget the day when we first met in the park. (when作时间状语，修饰met)
when引导限制性和非限制性定语从句，其先行词须是表示时间的名词，如day，year，time等。when可用“时间介词+ which”来替换。
例句
a. I’ll never forget the day when I met you.
b. I’ll never forget the day on which I met you.
c. April Fool’s Day is that special day of the year when you should play a joke on someone! Children’s favorites are to put salt in the sugar bowl for Dad’s morning coffee or put chalk on a desk chair at school so the teacher gets a white backside! But remember, if you play a joke after 12 noon, YOU are the April Fool!
d. We will put off the outing until next week, when we won’t be so busy.
e. March 10, 1876 was the day when（= on which） the first complete sentence was sent over a telephone.
f.The day may soon come when we don’t bother to go to office but just work at home.
（2）关系副词when在从句中作时间状语
注意：表示时间的先行名词，若其定语从句不是缺状语，而是缺主语或宾语，关系词要用which或that。因为用when来引导定语从句的前提条件是：when在其所引导的定语从句中作时间状语。
例句
a. The day, which began brightly, ended with a violent storm.
那天开始的时候还是晴空万里，后来却下起了暴风雨。（which作主语）
b. I’ll never forget the time which I spent on campus.（which作spent的宾语）
c. I’ll never forget the day when we first met in the park. (when作时间状语，修饰met)
