关系副词引导的定语从句中,何时用where,why,when;何时用in,which

先行词为表示地点的名词且在定语从句中作状语时用where,先行词为表示时间的名词且在定语从句中作状语时用when,先行词为reason且在定语从句中作状语时用why.关系副词的使用场合有两种：
1.定语从句中,主,谓,宾成分完整时.
He will remember the day when he joined the Party.
2.定语从句中,谓语动词为不及物动词时.
He will remember the factory where he worked ten years ago.
This is the reason why he was late for school.
如果定语从句中,谓语动词为及物动词时,它后面又没有宾语时,就要用关系代词.
He will remember the day which he spent togeher with us.
He will remember the factory which he visited last year.
This is the reason which he gave/explained for his being late for
school.
in which 引导定语从句,作状语.
He will remember the factory in which/where he worked ten years ago.
I don't like the way in which he spoke to his father.