Correct the grammar mistakes in the sentences provided.

1. He goes to bed very early. 2. Do they live in Canada? 3. I usually cook dinner for my family. 4. Do they have a meeting every week? 5. She doesn't like tennis. 6. Does John have enough money? 7. Does he know the answer? 8. Robert plays baseball on the weekend. 9. They have lots of free time. 10. Do they usually drive to work? 11. Jenny does not work at a restaurant. 12. She worries too much about the exams. 13. My father wants to travel to Spain. 14. Why do you study English? 15. He doesn't drink tea. 16. They start classes in the morning.