定语从句点击添加标题点击添加标题在复合句中作定语、修饰主句中某一名词或代词的从句，叫做定语从句。被定语从句修饰的词叫先行词，通常位于定语从句之前。 n. 有不好的结局的故事I dont like stories that have unhappy endings. 先行词 主语 谓语 宾语 定语从句修饰先行词that是关系词，在定语从句中充当主语。一.关系代词点击添加标题点击添加标题(1) who, whom who在从句中作主语或宾语，whom在从句中作宾语。eg: The girls who/that were badly hurt in the accident are my classmates. He is the man whom/who/that I saw yesterday. 一.关系代词点击添加标题点击添加标题 (2) whose 谁的 whose用来指人或指物，在从句中作定语（若指物， 还可与of which互换）。 eg: This is the student whose bike was stolen last week. Please pass me the book whose (of which) cover is green. 一.关系代词点击添加标题点击添加标题(3) whichwhich 指物，在句中作主语或宾语。 eg: The coat which I put on the desk is black. Here is the pen which you lost yesterday. 一.关系代词点击添加标题点击添加标题(4) thatthat 既可指人又可指物，可以代替who, whom和which, 在句中作主语或宾语，但不能作介词的宾语。eg: I hate people who/that talk much but do little. The person to whom you just talked is our teacher. 宾语 注 意点击添加标题点击添加标题先行词指物时，在下列情况下只能用that引导，不用which引导：1. 当先行词是all, little, much, none, everything, anything, nothing等代词时。eg: Is there anything that you dont understand? Tom told his mother all that had happened. 注 意点击添加标题点击添加标题2. 当先行词前面有the only, the very, the last等修饰时。eg: This is the only book that I can find. 3. 当序数词或形容词最高级修饰先行词时。 eg: This is the best book that I have ever read. 注 意点击添加标题点击添加标题 4. 当先行词前有only, all, any, no等词修饰时。 eg：I want to read all the books that were written by Lu Xun. 5. 当主句是以疑问词which开头的特殊疑问句时。eg：Which is the hotel that you like best ?二.关系副词点击添加标题点击添加标题 (1) when先行词表示时间且在定语从句中作状语。when相当于“介词+which”。先行词时间eg: I still remember the day when/on which I first came to Beijing. the year in which Ill never forget the day when/on which I joined the league. 二.关系副词点击添加标题点击添加标题 (2) where先行词表示地点且在定语从句中作状语。when相当于“介词+which”。 eg: Beijing is the place where/ in which I was born. This is the factory where / at which my father worked. My father worked at the factory.二.关系副词点击添加标题点击添加标题 (3) why先行词表示原因且在定语中充当状语，其先行词只有表示原因的reason一词。eg: Give me the reason why you were late. We dont know the reason why he suddenly fell ill.