第1个回答 2012-10-06
The games which I play are football and tennis.
被修饰的词叫先行词，ex. the games
定语从句放在先行词后，ex. which I play
关系代词（放在原句中which位置上的）有who(修饰人的，可主可宾),whom（尝不用，用who就好，但在选择题，有whom和who并要代替宾语的，选whom），which（代物），that（万能型，实在不会就全用它，可是有些选择题不行，例如，Do you remember the day _____ he came to see you. A. who B .that C. when D. which ,要选C，不能选B，其实B没错，不是语法不行，而是出题人有病），whose（物，代谁的）,在先行词用only啊，最高级啊，序数词修饰的情况下，只能用that代。
关系副词（也放在原句中which位置上的）有where（代地点），why（代原因），when（代时间）
如上述关系副词，代词在定语从句中充当主语，ex. This is the man who helped me中who helped me是从句，who在此是主语,则who不可省略；充当宾语，ex. the house which he had lived was fired.中which he had lived是从句，改为陈述句是he had lived which(in the house),which作宾语，则which能省略。一句话：主语不能省，宾语能省。看不懂就都别省，这样不会错。
来两道例题，全对了，那，恭喜你学会了：
1.He is the student ______ understands English well.
2.He is a writer ______books are seldom read.
3.Do you know the woman______ he met?
4.This is the hotel ______ we are staying at.
5.The _Second_ World War______ millions of people were killed ended in1945.
6.The _only_ language ______ is easy to learn is the mother tongue.
1.who/that 2.whose 3.who/whom/that/可省略 4.which/that/可省略 5、6.that不能用which