1. This is the most delicious cake I've ever tasted.
⇒ I've never tasted a more delicious cake than this.

2. I've never met any more dependable person than George.
→ George is the most dependable person I've ever met.

3. There isn't anybody as kind-hearted as your mother.
→ Your mother is the most kind-hearted person.

4. There is no better teacher in this school than Mr John.
⇒ Mr John is the best teacher in this school.

5. Have you got any bigger than that one?
→ Is this the biggest one you have got?

6. I haven't traveled to Paris since last year.
→ I did not travel to Paris last year.

7. She has visited her grandparents for two years.
→ She began visiting her grandparents two years ago.

8. We started this project last month.
→ We have been working on this project since last month.

9. The last time he read the book was two days ago.
→ He has not read the book for two days.

10. They sold a new car a week ago.
→ They haven't sold a new car for a week.