Negative Questions with the verb "To Be" in the Simple Present

Negative questions 

In the Simple Present of the verb to be, negative questions are formed by reversing the order of the subject and verb, and adding not after the subject.

e.g. Am I not awake?
Are they not ready?

In spoken English, contractions are usually used in negative questions. In the contracted form of a negative question, the contraction of not follows immediately after the verb. For example:

Without contractions                                   With contractions
Are you not awake?                                   Aren't you awake?
Is he not awake?                                        Isn't he awake?
Are we not awake?                                       Aren't we awake?
Are they not awake?                                  Aren't they awake?

It should be noted that there is no universally accepted contraction for am not. In spoken English, am I not? is often contracted to aren't I?. However, although the expression aren't I? is considered acceptable in informal English, it is not considered to be grammatically correct in formal English. In formal English, no contraction should be used for am I not.

Change the affirmative statements resulting from Exercise 1 into negative questions. Except where the subject of the verb is I, write both the form without contractions and the form with contractions. For example:
I am cautious.
Am I not cautious?

They are friendly.
Are they not friendly?
Aren't they friendly?