Question

英语：用定语从句合并句子

my uncle had 3 sons, two of them died during the last earthquake

请详细补充啊，说说为什么

Answer 1

My uncle had 3 sons, (yet可要可不要) two of whom died during the last earthquake.
My uncle had 3 sons, of whom two died during the last earthquake.

注：
1.虽上下句都以逗号间隔，但of whom引导的均为限制性定语从句，修饰限定先行词sons
2.two与of whom位置关系，可前可后，起进一步补充、限定
3.第一种表述常用，推荐

Answer 2

My uncle had 3 sons, two of whom died during the last earthquake.
or: My uncle had 3 sons, of whom two died during the last earthquake.
也就是把them换成从句的关系代词whom.就成了含有非限制性定语从句的句子了