Sure, here are the sentences with the correct verb forms:

1. They **will do** it for you tomorrow.
2. My father **will call** you in 5 minutes.
3. (There is no number 3 in your list.)
4. We believe that she **will recover** from her illness soon.
5. I promise I **will return** to school on time.
6. If it rains, he **will stay** at home.
7. **Will** you **take** me to the zoo this weekend?
8. I think he **will not come** back to his hometown.