the old man has two sons,both of ()are lawyers,这个题目中逗号改为句号,那有什么不同呢?这两个句子应该怎么填呢?有逗号的和有句号的,

Question

the old man has two sons,both of ()are lawyers,这个题目中逗号改为句号,那有什么不同呢?
这两个句子应该怎么填呢?有逗号的和有句号的,

Answer 1

the old man has two sons,both of (whom)are lawyers
这是主从复合句,both of (whom)are lawyers是个非限制性定语从句
比较：
The old man has two sons.Both of (them)are lawyers
这是两个独立分句,所以括号里面的用词也不一样,前者是关系代词,后者是人称代词
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