The present simple tense has several names: Present simple, Simple Present, or Present indefinite. It is normally used for actions that happen in a general time period or right now. It is also commonly used for general facts or routines. On other rare occasions, the Present simple could be used for future scheduled events.
For Routines or repeated actions
<----x--x--x--x--|--x--x--x--x----> Multiple Points over time.
Facts and Generalizations
<------------------|------------------> Throughout a general period of time.
Scheduled future event
<-----------------|--x---------------> At one point in the future.
Subject + Base Verb + Complement.
Examples:
I work hard.
They wake up every day.
We sing on Fridays.
You live in Costa Rica.
Note: depending on what Subject or Pronoun you use, the verb may be conjugated with an extra S, and the verb's base spelling may change.
Subject + Base Verb with S + Complement.
Examples:
He plays the piano.
She sleeps at night.
It barks a lot.
Subject + Auxiliary Do/Does + Not + Base Verb + Complement.
Note: The negative can also use the contraction of Don't and Doesn't.
Examples:
I do not like shrimp.
We do not have a car.
It does not work well.
Auxiliary Do/Does + Subject + Base Verb + Complement?
Examples:
Do you like Karaoke?
Does she eat pizza?
Do they have a car?
Wh question word + Auxiliary Do/Does + Subject + Base Verb + Complement?
Examples?
What do you like?
When do they work?
Where do we eat?
Who do I talk to?
Why does she play guitar?
How does he eat so much?