Question

who which where 的后面可以加句子吗？在它们前面加逗号和不加逗号有什么影响呢

Answer 1

作为疑问代词，它们一般用于疑问句（比如where are you from？你来自哪里？）。

其他用法则视具体情况而定，作为关系代词在定语从句中：He is the  only one in our class ，who can attend the swimming game.(他就是我们班唯一能参加游泳比赛的人)，前面不加逗号是限制性定语从句，加逗号的是非限制性的。

如：She loves  her hometown very much，where she spend her happy childhood.(她非常爱她的家乡，在那里她度过了欢快的童年)。两者意义上的区别不大。

另作为名词性从句的引导词，后可以接不定式或一般陈述句，如：I don't know what to do next(我不知道接下来做什么)，What he said is wrong(他说的话不对)。

扩展资料：

1．用which不用that引导定语从句的三种情况：

①在引导非限定性定语从句时，和在介词后不能用that，应用which。如：

Football，which is a very interesting game，is played all over the world．

②先行词为that时，为了避免重复，定语从句用which不用that引导。

如：That which you borrowed from me wasn't a real diamond necklace．

③介词后用which不用that引导。如：

The method with which you solved the problem is very good．

2．用that不用which的七种情况：

①先行词前有形容词最高级或序数词修饰时，用 that不用which引导。如：

This is the best place that I have ever visited．

The second question that is asked is why we don't fall off the earth．

②先行词为little，much，all，none，few，（the）one， something，everything，nothing，anything等不定代词时，用that引导。如：

There is nothing in the world that can frighten him．

③先行词既有指人的名词又有指物的名词时，用 that引导。如：

He told us about the people and the cities that he had visited．

④先行词前有any，all，no，few，every，some，little， much，（the）very，（the）only，（the）last等词修饰时，用 that引导。如：

This is the very coat that I need．

Is oxygen the only gas that helps fire burn？

⑤先行词为which时，为了避免重复，用that引导。如：

Which is the book that you bought yesterday？

⑥先行词在从句中作表语时，常用that引导。如：

Shanghai is no longer the city that it used to be in the 1930's．

⑦当主句是There be．．．句型时，用that引导。

There are two tickets for the film that are for you two．

参考资料来源：百度百科：引导词