I READ A BOOK

Example:

I READ A BOOK

I

Verb expression is combined with its referring noun

"READ + A BOOK"

Therefore, "I read a book" could be expressed mathematically like this:

Note 1: I use the brackets to indicate a "related idea".

Note 2: A question of "Time/Tense", will be presented later.

The idea is a book is being read by a person.

You do not need everything literally written down to understand the idea in my mind.