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

Questions

For the Simple Present of the verb to be, questions are formed by reversing the order of the subject and the verb, so that the verb precedes the subject.

e.g. Am I awake?
Are they ready?

In the first example, the verb am precedes the subject I. In the second example, the verb are precedes the subject they. In written English, questions are always followed by a question mark: ?

2. Change the affirmative statements resulting from Exercise 1 into questions. For example:
I am cautious.
Am I cautious?

They are friendly.
Are they friendly?