Fixed prepositions that follow certain verbs and adjectives: interested in, depend on, good at
Verb/Adjective/Noun + fixed preposition + object
Same structure with negation
What are you interested in? Who does it depend on?
💡 After prepositions, use gerund (-ing) for verbs: interested in learning, good at swimming.
✓I'm interested in art.
✗I'm interested at art.
Interested takes 'in'.
✓It depends on the weather.
✗It depends of the weather.
Depend takes 'on'.
✓She's good at cooking.
✗She's good in cooking.
Good takes 'at' for skills.