Question

be动词引导的一般疑问句

Answer 1

be 分为 am/ is/ are/was/were
它引导的一般疑问句 是把 系动词be 提前
比如：There is a ruler on the desk.---Is there a ruler on the desk?
They are at work.---Are they at work?
I am a student. ---- Are you a student?
he was doing his housework .----- was he doing his housework?

Answer 2

be 分为 am is are 它引导的一般疑问句 是把 系动词be 提前 比如：This is a ruler.---Is this a ruler? These are rulers.---Are these rulers? I am a student. ---- Are you a student?

追问

有时直接把be动词提前是不对的