Sure! Here are the rewritten sentences based on your prompts:

1. They last played soccer in 1990.
= They haven't played soccer since 1990.

2. It's ten days since he came here.
= He last came here ten days ago.

3. My father spent half an hour repairing my bike.
= It took my father half an hour to repair my bike.

4. It will take you 50 minutes to go there by bike.
= You will take 50 minutes to go there by bike.

5. It's twenty years since I visited that town.
= I haven't visited that town in twenty years.

6. David hasn't smoked for two months.
= It's two months since David last smoked.
= David last smoked two months ago.

7. The astronauts orbited the earth in two hours.
= It took the astronauts two hours to orbit the earth.

8. It took them 80 days to travel around the world.
= They spent 80 days traveling around the world.

9. He spends an hour teaching his son math a day.
= It takes him an hour a day to teach his son math.

10. I spend thirty minutes a day watering the garden.
= It takes me thirty minutes a day to water the garden.

11. It took him 4 days to finish the report.
= He spent 4 days finishing the report.

12. She hasn't eaten meat since last year.
= It's been since last year that she last ate meat.
= She last ate meat last year.

13. My mother spent 3 hours making a dress.
= It took my mother 3 hours to make a dress.

Let me know if you need any more help!