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二、关系副词引导的定语从句 引导定语从句的关系副词有when, where或 why等。when, where, why分别在定语从句中作状语，在意义上相当于介词+which结构，分别代替表示时间、地点或原因的先行词。 A．when 指时间，在定语从句中作时间状语。 I still remember the day when I first came to this school. 我仍然记得我第一次来到这所学校的那一天。(when= on which) He came at a time when we needed him most. 他是在我们最需要他的时候来的。(when= at which) We will never forget the year 1949, when th People's Republic of China was founded. 我们永远忘不了1949年，那是中华人民共和国成立的一年。(when= in which) B．where 指地点，在定语从句中作地点状语。 I recently went back to the town where I was born. 我最近曾回过一次我出生的城市。(where = in which) I would like to live in a country where there is plety of sunshine. 我想住在一个阳光充足的国家。(where = in which) What's the name of the place where you spent your holiday 你度假的那个地方叫什么名字？(where = at which) C．why | 
