Question

yes they're playing with each other怎么回答？

Answer 1

答：Yes， they're playing with each other这个英语句子的中文意思是：对呀/ 不错，他们在一起玩呢。对于这个句子，我们可以这样来回答：

— I wonder whether they are in danger.   

—Not at all.I am sure that they are safe. Don't worry about them. 

Answer 2

这就是个回答呀！
问句：Are they playing each other?
答：Yes,they are.
续答：Don't worry about them.

Answer 3

Yes, they're playing with each other，是针对对方的询问做出的肯定回答，属于陈述句，不需要别人回答。