As always, we expect you to come up with sentences for us to comment on. We cannot answer open-ended questions.
Interested in Language
When should I use of?
When should I use about?
I read the books that I always confused of and about.
I had checked dictionaries many times,but I still confused.
Can teacher there help me on this?
"Peter just didn't see the point of it."
Can I use "about" instead of "of"?
You cannot assume from the above that they are interchangeable in every case.
Teacher, what about this?
"I don't think we're in the business of editing your attempts at pornography."
Can I use about instead of of?
No, "about" dosen't work there.
You need to understand that prepositions are a very difficult part of English to learn. Just because two prepositions have the same general meaning doesn't mean you can use both of them. In the examples you gave, you need to know that "the point of something" is a standard phrase and that "in the business of doing something" is a standard phrase.
Sometimes, they're interchangeable. For example, "I dream of you every night" and "I dream about you every night" both work.
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.
Polyester, the use of prepositions is one of the most challenging areas of English. Learning dictionary definitions will not always get one to the correct choice. The best way to learn them is to read and listen and then notice how individual prepositions are used. It takes time.