How is the present simple tense used?

The present simple is the tense used to describe actions that are timeless. If the time of the action can be defined, then the present simple tense is used. The time and/or place is stated or understood.
The Present Simple Tense is used in the following situations:

* permanent actions -
* actions that happen on a regular basis
* facts
* statements that are always true
* to state existence
* to state feeling
* static verbs
* general actions


Examples :

I go to school everyday

I live in New York.

Water boils at 100 degrees Celsius

I love to go to my English class.

This is a pen.