限制性定语从句：
限制性定语从句对先行词起限制、修饰的作用,关系代词有that,which,whom,who,whose以及关系副词when,where等,没有明显的逗号把从句与主语分开,表达的意思为被修饰词的一个定语.
例句：
Do you know the professor who is speaking at the meeting?
Where is the book which I bought this morning?
限制性定语从句：
限制性定语从句对先行词起限制、修饰的作用,关系代词有that,which,whom,who,whose以及关系副词when,where等,没有明显的逗号把从句与主语分开,表达的意思为被修饰词的一个定语.
例句：
Do you know the professor who is speaking at the meeting?
Where is the book which I bought this morning?