Simple-Present
Simple-Present-FormsSimple-Present-Verbs
Forms-in-the-Simple-Present
Simple-Present-Diagram

Affirmative sentences
I/we/you/they read a book.
He/she/it reads a book.
Negative sentences
I/we/you/they do not read a book.
He/she/it does not read a book.
Questions
Do I/we/you/they read a book?
Does he/she/it read a book?