复合句 = 主句 + 定语从句
主语 + 定语从句 + 谓语 + 其他成分
The boy ( who is listening to music ) is my brother.（who可用that替代）
This is the book which you are looking for.（which可用that替代）
I’ ll never forget the day when/ on which I joined the league.（时间状语）
This is the house where/ in which I lived two years ago.（地点状语）
Yesterday we went to visit he house where/ in which ( the great winter used to live ).（不及物动词）
The house which/ that ( the built in 1987 ) stayed up in the earthquake.（及物动词）
Kunming is a beautiful place where ( flower are seen all the year round ).
October 1st is the day when ( new China was founded ).
The window ( Which/ that was opend this morning ) has been broken.（从句没有主语，不用关系副词）
The place ______________ interested me most was the Children’s Palace.
A. which B. where C. what D. in which
Do you know the year _________ the Chinese Communist Party was founded?
A. which B. that C. when D. on which
That is the day ____ I’ll never forget.
A. which B. on which C. in which D. when
The factory ____ we’ll visit next week is not far from here.
A. where B. to which C. which D. in which
Great changes have taken place since then in the factory _________ we are working.
A. where B. that C. which D. there
答案：A，从句不缺成分，用关系副词，先行词in the factory是地点状语，用where