1 、在复合句 ( 包括主句和从句中 ) ,修饰主句中某一名词或代词的从句,叫做定语从句
它所修饰的词叫先行词
定语从句跟在先行词的后面
定语从句定语从句的基本结构•先行词 + 关系词+ 从句The baby is smokingThe baby is cute
The baby is smoking
The baby who is smoking is cute
关系代词先行词定语从句先行词是人,在从句中做主语时可用 that 或 who, 不可省略
不可用 whom 和 which• The building that/which is being built will be used as a library
• 先行词是物,在从句中做主语时,可用 that 或 which ,不可省略 The baby is dancing
The babies are lovely
The babies are dancing
关系代词关系代词在意义上与所修饰的先行词一致
The babies who are dancing are lovely
做主语 The boy was John’s brother
关系代词做宾语 The boy (who/whom/that) we saw yesterday was John’s brother
We saw the boy yesterday
先行词是人,在从句中做宾语时,可先行词是人,在从句中做宾语时,可用用 whowho 、、 whomwhom 、、 thatthat 或省略
The boy was John’s brother
关系代词做宾语 The boy (who/whom/that) we saw yesterday was John’s brother
We saw the boy yes