1. The Present Simple Tense

THE FORM

The present tense is the base form of the verb:

I speak English.

But the third person (she/he/it) adds an -s:

She speaks English.

Questions are formed by adding the auxiliary verb DO:

Do you speak English?    or

Does she speak English?

Negatives are formed by adding the auxiliary verb DO and NOT:

You do not speak English.

He does not (doesn't) speak English.

THE USE

Watch the following movie taken from the British Council website to get a better picture of one of the uses of the Present Simple Tense: