ESL students spend a lot of time memorizing prepositions and the words they go with. These expressions are purely idiomatic. That means there is no way we can explain why a particular word takes a particular preposition. For example, we use the preposition ‘on’ with ‘dependent’ and ‘of’ with ‘independent’.
- He is dependent on his parents. (NOT He is dependent of his parents.) It is not easy to decide which preposition to use with which adjective. In addition, American usage sometimes differs from British usage. Here is a list of adjectives that take the preposition of.