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人吗？
2.修饰人或物只用that的情况： a. 先行词为指物的不定代词all ,
much , little, few , everything , something , that.
3)The book that is on the table is mine. = The book on the table is mine.
4) We have nothing that we should fear. anything , nothing
b.先行词前有最高级、序数词及last , only , very , all , no时
c. 先行词既有人，又有物时
d. 主句是who / which引导的特殊疑问句，而先行词又指人或物时。 eg.1)Is there anything that I can do for you? 有让我做的事吗？
2)He is the only one that can help us at the moment. 他是现在能帮助我们的唯一的人。
3)He talked about the teachers and schools that he had visited. 他谈论着他拜访过的老师和参观过的学校。
4)Which is the machine that we used last Sunday? 我们上周星期天用过的机器是哪一台？
3.修饰物只用which的情况：
a. 先行词在定语从句中作介词的宾语时
b. 先行词为that时
eg.1)This is the house in which Lu Xun once lived . 这就是鲁迅以前住过的房子。
2)What’s that which you are holding in your arms? 你抱着的那个是什么？ *三、定语从句可简化为短语 1．定语从句为被动语态时可简化为过去分词短语；定语从句为现在进行时可简化为现在分词短语。
2．定语从句的谓语(be)后是介词短语，可简化为介词短语作定语。
3．定语从句的谓语动词含情态动词，可简化为不定式。
eg.1)I bought a book that was written by Lu Xun.
= I bought a book written by Lu Xun. 2)Tell the children who are playing there not to do that.
= Tell the children playing there not to do = We have nothing to fear. 练 习
一、用适当的关系代词填空
1.Is it the very house ________ you lived in ten years ago?
2.The woman _____ sits next to the door is my mother.
3.I’ll never forget the year _____ I joined the League.
4.It is the house _____ I was born. 5.The house ______ roof is broken has been repaired. 二、用短语来改写下面的定语从句部分。1.The man that is talking with Mary is my brother.
__________________________________ 2.This is a book which was written by a worker
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