助动词或be动词开头的是什么句

助动词总共5个，do，be，have，shall，will。如果这些助动词开头，那就是一般疑问句。

例句

Do you swim every weekend?

Have you finished doing your homework?

Is he learning English now?

Will you go to school tomorrow?

Shall I go with you?

另外 be 动词还是个 连系动词。若在句首，也是一般疑问句。

Are you a teacher?