由that引导的定语从句:that在定语从句中可以指人或物.在从句中作主语.谓语动词或介词的宾语.(但不能放在介词后面作介词宾语)例如: The letter that I received was from my father. 注意在下面几种情况下必须用that而不用which引导定语从句: ①先行词是不定代词all,few,little,much,something,nothing,anything等.例如:All that we have to do is to practise every day. ②先行词被序数词或形容词最高级所修饰.例如:The first lesson that I learned will never be forgotten.This is the best film I’ve ever seen. ③先行词被all,any,every,each,few,little,no,some等修饰.例如:I have read all the booksyou gave me. ④先行词被the only,the very,the same,the last修饰时.例如:He is the only person that/(who) I want to talk to . ⑤先行词既有人又有物时.例如:They talked of things and persons that they remembered. ⑥当句中已有who时.为避免重复.例如:Who is the man that is talking to John? ⑦用作关系代词.修饰表示时间的名词如day,time,moment等.代替when.例如:It happened on the day that/when I was born. ⑧如有两个定语从句.其中一个关系词已用.则另一个用that.例如:Edison built up a factory which produced things that had never been seen before. 【查看更多】