Questions with BE in English

The table below shows the way we build the questions with verb BE in English. There are also short Yes/No answers to these questions. The most important thing to remember here is that this type of questions is built by changing the order of words. We don't have to add any auxiliary verbs to create these questions.

Am I late? Yes, you are
No, you aren't.
Are you busy? Yes, I am.
No, I 'm not.
Is he / she polite? Yes, he / she is.
No, he / she isn't.
Are we
on time? Yes, they are.
No, they aren't.