Sure, here are the correct verb tenses for each sentence:

1. My mom and my sister **cook** lunch every day. (cook)
2. They **will have** breakfast together tomorrow. (have)
3. They **eat** out once a week. (eat)
4. My father always **makes** delicious meals. (make)
5. Tom **does not eat** vegetables. (not eat)
6. The flight **starts** at 6 a.m every Thursday. (start)
7. Where **does** that guy **come** from? (come)
8. Last week, my mother **took** me to the zoo. (take)
9. What **did** you **watch** on TV last night? (watch)
10. **Did** you **go** to see the concert yesterday? (go)
11. At present, I **am watching** a cartoon at home. (watch)
12. My children **did not do** their homework last night. (not do)
13. My parents **were not** teachers two years ago. (be not)
14. I **did not go** to school last Sunday. (not go)
15. She **has bought** a new car since last month. (buy)