That/which

 

which 引导的从句一定要用逗号, 分开 that 引导的从句不要分开 经常出现的错误是该用 that 的地方用了 which

 

That/which 经常用来引导修饰从句. 如果修饰从句可以省略掉而不影响句 子的完整性,也就是非限制性从句, which, 并用逗号把修饰从句从主句分 .

 

The recovered dogs, which were treated with antibiotics, are released.

 

如果修饰从句不可以省略掉, 也就是限制性从句, 那就用 that,并不用逗号 分开.

 

Dogs that were treated with antibiotics recovered.

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