Some adjectives need a preposition before their object. There doesn't seem to be a logical rule, I'm afraid! We just need to learn them.
Here are some of the most common ones:
- famous for
France is famous for its food.
- proud of
He is very proud of his new car. - interested in
Julie is very interested in sport. - pleased with
John is very pleased with his new suit. - bad at
They are very bad at maths. - good at
Einstein was very good at physics. - married to
My mother has been married to my father for 20 years. - excited about
I'm very excited about my holiday. - different from / to
Coffee is different from tea. - afraid of
I'm afraid of spiders.
Try an exercise about these adjectives and
prepositions here.
Click
here for all the exercises about prepositions.