=> You play tennis better than I do.

=> It’s two years since I last went to the dentist’s.

=> She never went to Paris without buying a new dress.

=> After having spent seven years at secondary school I went to university.

=> There’s no need to make her change her mind.

1. I don’t play tennis as well as you do.
=> You play tennis better than I do.
2. I haven’t been to the dentist’s for two years.
=> It’s two years since I last went to the dentist’s.
3. Whenever she went to Paris she bought a new dress.
=> She never went to Paris without buying a new dress.
4. I spent seven years at secondary school and then I went to university.
=> After having spent seven years at secondary school I went to university.
5. It’s not worth living to make her change her mind.
=> There’s no need to make her change her mind.