Future indefinite or future in the past 5. i (go) to the post-office for you? 6. i had no idea when they (come). 7. we said we (not watch) tv all day long. 8. i doubted if they (make) it up. 9. tell them again, perhaps they (understand). 10. they (come) if we invite them? 11. there (be) a lot of people at the conference. 12. she says she (have to) change the clock. 13. she was afraid he (feel) depressed. 14. i assure you he never (tell a lie). 15. they say this firm (publish) this book next year.

5. Shall go to the post-office for you?
6. I had no idea when they would come.
7. We said we would not watch TV all day long.
8. I doubted if they  would make it up.
9. Tell them again, perhaps they will understand.
10. Will they come if we invite them?
11. There will be a lot of people at the conference.
12. She says she will have to change the clock.
13. She was afraid he would feel depressed.
14. I assure you he will never tell a lie.
15. They say this firm will publish this book next year.