.The ancient houses haven't been maintained for at least sixty years

→→ BĐPĐ : S + haven't / hasn't + been + V3 / PII
2.I'm fond of Johnny although he behaves terribly. ⇒ ⇒ In spite of Johnny's terible behaviour, I'm fond of him.
3.I can't speak French as well as Alan-> Alan speaksthat reaches/ is called/ A tropical storm/ a hurricane

1. Nobody has maintained the ancient houses for at least sixty years. → The ancient houses have not been maintained for at least sixty years.

2. I'm fond of Johnny although he behaves terribly. → In spite of his terrible behavior, I'm fond of Johnny.

3. I can't speak French as well as Alan. → Alan speaks French better than I do.

4. Lisa has always been mean with money, so she doesn't have many friends. → If Lisa weren't always mean with money, she would have more friends.