I have a lot of books,three of which are in English.I have a lot _其他解答

I have a lot of books,three of which are in English.
I have a lot of books and three of them are in English.
这两句话怎么区别呢?怎么就多个‘,’就一个是用which,一个用them?

人气：149 ℃　时间：2019-10-20 20:10:45

解答

第二句是并列句,两句话并列中间必须要用and连接,每句话都有单独的主语,因此用them.
第一句用了逗号,后面的是从句,要有引导词which.