I don't know how i have to use which one of prepositions in sentences for example :he believes for telling the truth why we say for .why we don't say of i have problem with using of preposition
You would say 'He believes IN telling the truth'.
This is hard subject. When you learn a verb, you must learn which preposition goes with it. So, when you learn "to believe", you have to learn it as "to believe in something" Good luck.