他们都是,是both are they 还是 they both are?

问题描述:

他们都是,是both are they 还是 they both are?
Are your parents teachers?
Yes,both are they
Yes,they both are
原题是这样的

应该是Yes ,they both are
在完整的句子里,both 应该放在be 动词之后,但是在简略回答时,放在be动词之前