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?
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.
Questions with other main verbs
You must use the correct form of to do:
Put "do/does" in front of the pronoun and the main verb into the infinitive.
- He walks a lot. Does he walk a lot?
- You walk a lot. Do you walk a lot?
- I walk a lot. Do I walk a lot?
- They walk a lot. Do they walk a lot?
You can answer by only saying Yes. / No. but this is very impolite. Better say: Does he walk a lot? – Yes, he does. / No, he doesn't.
Rewrite the sentences into yes-no-questions. Remember to use the form of to do.
Übungsvorschlag: wieder cloze, Sätze wie oben in den Beispielen, in beiden Übungen sollten Vokabeln aus Unit 1-2 wiederverwendet werden
Keeping the word order
Another way of asking a "yes-no- question" is to say a statement, but raise your voice at the end: "You are tired?"