他们有一台电视么？是的，有。用英语翻译

你好！do they have a television set（TV）？
yes，they do。

前面的不是有语法错误就是有意思错误！！！！

is there a TV set in their house?yes,there is .
也可以说 do they have a TV set .yes,they do .

Have they got a TV?
Yes,they have.

Do they have a TV?
Yes,they have.

Does he has a television/TV set?
Yes,he does.

Do they have a TV set?
Yes, they do.