I am often bump in the "of" preposition in different sentences. Here are some of these:
The new professor is of Turkish descent.
He is a citizen of Russia.
I dream of visiting Europe.
Here are examples when you wish to use the "of" preposition but need to use another one:
The new computer from the tech giant.
The Nile is the longest river in the world.
The girl recovered from her illness.
What the global rule one can follow to not make mistakes in speech construction?