Is he watching TV?
陈诉句改一般疑问句,一般规律
S+ be动词\情态动词句则只需将 be动词\情态动词提前
He should study hard.Should he study hard?
S+V句则将V对应的助动词提前
He works in a bank.Does he work in a bank﹖我觉得应该是IS he iswatchingTV现在进行时不是要加be动词吗一个句子中不可能同时出现两个系动词或情态动词的（除非有and等连词或副词）现在进行时中的is已经被你提前了啊哦谢谢啦