I bought many books yesterday,three of which are written by

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I bought many books yesterday,three of which are written by Lu Xun.
这句话里的which可不可以改用them

不可以,three of which引导非限制定语从句,如改成them,两个完整的句子间没有连词,就不符合语法啦.
再问：非限制定语从句和限制定语从句到底有什么区别，我一直没搞懂来着。。
再答： 1、先行词跟从句有无逗号隔开 2 . 非限制定语从句不用that 3.非限制定语从句 which做从句的宾语也不能省略

I bought many books yesterday,three of which are written by books,i,these,bought,yesterday,are,the I have a lot of books,three of which are in English. Yesterday i bought a book.Books are not very expensive. books i these bought yesterday are the连词组句 I bought the books which are on the counter. these are the things which I bought yesterday. I bought a book yesterday .it was written by Mark Twain 合起来怎 I bought the books which are on the counter和the books which This is one of the books which _______ written by Mark Twain I bought some books,and all of them are interesting. He has written many books,two of them are widely read.错在哪为什