Dưới đây là các câu đã được viết lại theo yêu cầu của bạn:

1. **I won a substantial amount of money in a competition, which allowed me to take a break from work (couldn't)**
→ But for the substantial amount of money I won in a competition, I couldn't take a break from work.

2. **The city became famous for having so many churches. (there)**
→ There are many churches in the city, which made it famous.

3. **Robots can well replace workers in the future (there is)**
→ There is a possibility that robots can replace workers well in the future.

4. **No matter how you eat them, blueberries taste great (in whatever)**
→ In whatever way you eat them, blueberries taste great.

5. **The explorers disregarded the regulations of the national preserves.**
→ The explorers ignored the regulations of the national preserves.