Yes/No questions with to be
When do you use a yes/no question?
You use it when you want to know if something is true or false. For example: Your friend doesn't look happy when you see him. You ask him: Are you okay? because you want him to confirm your feelings.
How do you pose a yes/no question?
Change the word order: put the verb in front of the
pronoun/noun:
Noun/pronoun + to be + …

To be + noun/pronoun + …?
You are tired.
Are you tired?
The boy is sick.
Is the boy sick?
You can answer: Yes. / No.. But this sometimes sounds impolite. It is better to answer: Are you a teacher? – Yes, I am. / No, I'm not.
Rewrite the sentences into yes/no questions. Do not change the pronouns.