Of-Have | Commonly Confused Words

Of

Used to indicate belonging or origin between two items, or to specify a part or amount.

From then on she took control of everything.He said, 'Of course I am.'And "my lady" instead of "madam"?

This word has no antonyms

/hæv/

To possess, own, or hold something

Even good people have secrets.'The captain had sent me to check the damage again."Listen, Mr. Killjoy, I'm having a perfectly marvelous time.

The word of is a preposition; it's not a verb.
The phrase "could of" should actually be "could have".
Remember, have is often used with modal verbs like could, should, and would.
You use of to show belonging or association, like a cup of tea.
Have expresses possession or is used as an auxiliary verb, while of indicates relationships among parts or items.