The simple present expresses an action in the present taking place regularly, never or several times. It is also used for actions that take place one after another and for actions that are set by a timetable or schedule. The simple present also expresses facts in the present.
The simple present is a verb tense with two main uses. We use the simple present tense when an action is happening right now, or when it happens regularly (or unceasingly, which is why it's sometimes called present indefinite).
The affirmative= asserting that something is true or valid.
I see you
The negative= a reply denying something.
I don’t see you.
The interrogative= asking a question.
Do I see you?
The simple present tense expresses daily habits or usual activities. ... or routinely in the past, present, and future. If you take a look at the table with the verb drink (previous page), you will notice that after he, she, it (3rd person singular) verb drink has a final -s.