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: