英语中什么是定语从句
定语从句是初中英语的一个重要知识点，下面总结了英语定语从句的相关知识点，供大家参考。
什么是定语从句
定语从句（也称关系从句、形容词性从句），一个句子跟在一个名词或代词（先行词）后进行修饰限定（对词句进行补充、修饰、限定，进而使原句内容更完整），就叫做定语从句。按语法句式，定语从句在整个句子中做定语的成分 。被修饰的词叫先行词。定语从句不同于单词作定语的情况，它通常只能放在被修饰的词（即先行词）之后。
定语从句由关系词（关系代词、关系副词）引导，关系代词、关系副词位于定语从句句首。
定语从句易错易混点归纳
1.关系代词和关系副词的混用。
例：I’ll never forget the days when I spent in New York with you.改：when应改为which或that。
2.固定句式出差错。
例：Mary is so lovely a girl as everybody loves her.改：as应改为that。
3.主谓不一致。
例：Tom is one of the students who likes swimming.改：likes应改为like。
4.与强调句型及其他句型的混合。
例：Was it in the shop that you bought the recorder that you lost your pen?改：第一个that应改为where。
5.特殊名词作先行词时关系词的选取错误。
例：I don’t like the way which you speak to her.改：应在which前加in或将which改为that或去掉。
例句
1.窗户朝南的那间房间是我的。
The room whose window faces south is mine.=The room of which the window faces south is mine.
2.我们正在看的这幢大楼过去曾经是一家医院。
The building which we are looking at used to be a hospital.
3. 那些被困在废墟里的人已经得救了。
Those who were trapped under the ruins finally got rescued.
4. 你们刚才谈论的那场地震好可怕呀！
The earthquake that you were talking about sounded frightening/shocking.=The earthquake about which you were talking sounded frightening.
5. 我的家人都是音乐爱好者，今晚将去看电影。
My family, all of whom are music lovers, are going to the movie tonight.
