they both have 还是they are both have；提问时,是用be动词还是do

你好,正确的表达应该是：
They both have ……
both 用于助动词之后,实意动词之前
本句中的have 实意动词,both 应该放在它的前面
例如：
They both have an apple .
他们俩都有一只苹果.
疑问句应该用 助动词 do ,
Do they both have an apple ?