赖世雄教你学英语语法
副词
3-21:关系副词when, why, how，where
例：this is the time when we should set out.
（该是我们出发的时候了。）
this is the reason why he was late.
（这就是他迟到的理由。）
this is the way how he succeeded.
（这就是他成功的方法。）
that is the place where i was born.
（那是我出生的地方。）
this is the reason because he was late.(x,because应改为why。）
i came yesterday where it was raining heavily.(x,yesterday为时间，故where应改为when。）
that is the city how he lives.(x,city为地方，故how应改为where。）
注意
关系副词亦可做复合关系副词，代替前面的名词（先行词），是故上述各例亦可改为：
this is when (=the time when) we should start.
this is where (= the place where) i live.