Make the following sentences interrogative and negative:
Example: Mary and Adam have been married for 10 years. – Have Mary and Adam
been married for 10 years? Mary and Adam haven’t been married for 10 years.
1. I have had an appointment with my dentist.
2. My parents have already sold their old car.
3. My sister has already been to Paris.
4. I have just finished reading this book.
5. Не has just come back.
6. He has lost his wallet.