"they are"的问句形式通常是在"they are"后面加上一个疑问词或者疑问词短语，例如：
Are they your friends？
Are they here？
Are they coming to the party？
Who are they？
What are they doing？
Where are they going？
希望这些例子能帮助你理解如何构造"they are"的问句。