Both of them study very hard.为什么要用them?

Both of them study very hard.为什么要用them? both them还是both of them?为什么? both of them翻译 ( )of them has a bedroom and a study.A.every B.both C.all D.each Both of them a student both of them both them both of their parents both their parents 的区别? 为什么不是both them而是both of them I met them both.=I met both of them. I think Chinese is as u___ as math.We should study both of them well.脑子抽了. both of them ; either of them; none of them; neither of them; 的区别和用法 either of them和both of them的区别 Both of them 与 all of them要如何区分 I will take both of them翻译 I love both of them 翻译中文 Both of them a student ji 3 not both of them are lazy both of them能换成both them吗?另外both是什么词性? THE FARMER LOOKED AT BOTH OF THEM AND SAIDBOTH OF THEM BOTH OF 是什么