We will be late (question)

[BOSBO]

An excercise in a textbook asked me to rewrite the following sentence as a yes/no question: "We will be late". My answer would be: "Do we will be late?". Is it correct?, ´cause it sounds more like a tongue twister to me and never heard it. I would rather say: Are we going to be late? but this last choice methinks isn´t allowed in the proposed excercise. Thanks a lot.

 

[The Newt]

"Will we be late?" or "Are we going to be late?" is what you want to say. "Do we will be late?" is not correct.

 

[Cenzontle]

Use "do" only when there is no other auxiliary verb in the affirmative sentence.
"We will be late" has the auxiliary "will".

 

[gengo]

Use "do" only when there is no other auxiliary verb in the affirmative sentence. "We will be late" has the auxiliary "will".

Another example of this rule:

We have seen him.
Have we seen him?
Do we have seen him?