https://www.youtube.com/watch?v=7TMXvhjMMS

To conjugate the present simple we use the infinitive for the subjects "I", "you", "we" and "they" and for the third persons "he", "she" and "it", we add a "-s" to the end of the verb.

Structure (Structure)
1. Affirmative Sentences (Affirmative Sentences)

Subject + verb.
Examples:

I talk. (I speak.)
He eats. (He eats.)
They learn. (They learn.)
2. Negative Sentences (Negative phrases)

Subject + auxiliary verb (to do) + negative auxiliary ("not") + verb.
Examples:

I do not [do not] talk. (I do not speak.)
He does not [does not] eat. (He does not eat.)
They do not [do not] learn. (They do not learn.)
Note: In negative phrases, the auxiliary verb ("to do") changes and the main verb goes in the infinitive.

3. Interrogative Sentences (Interrogative phrases)

Auxiliary verb (to do) + subject + main verb?
Examples:

Do you talk? (Do you speak?)
Does he eat? (Does he eat?)
Do they learn? (Do they learn?)
Note: As in negative sentences, in interrogative phrases the auxiliary verb ("to do") changes and the main verb goes in the infinitive.

Uses (Uses)
1. The present simple is used to talk about things that happen habitually. Unlike with Spanish, the simple present is not used to talk about something that is happening at the moment we speak.

We usually use the present simple with adverbs of time:

always (always), every day (usually), usually (often), often (often), sometimes (sometimes), rarely (rarely), hardly ever (almost never), never (never) ...

Examples:

I always talk to my mother on Sunday. (I always talk to my mother on Sunday.)
He never eats vegetables (He never eats vegetables.)
They usually learn something new in class. (They usually learn something new in class.)
Exception:
The adverbs of time go before the verb, except the verb "to be". When using "to be" the verb goes before the adverb.

Examples:

I am always happy. (I'm always happy.)
He is often sick. (He is often sick.)
They are rarely late. (On rare occasions they are late.)
2. It is used to talk about generalities or scientific facts.

Examples:

He does not eat vegetables. (He does not eat vegetables.)
She works in a hospital (She works in a hospital.)
Elephants live in Africa. (Elephants live in Africa.)
Bogota is in Colombia. (Bogotá is in Colombia.)
Do children like animals? (Do children like animals?)
Adults do not [do not] know everything. (Adults do not know everything.)
3. It is used for scheduled events in the near future.

Examples:

The train leaves at 10:00 (The train departs at 10am)
The party is tonight. (The party is tonight.)
Does the festival start tomorrow? (Does the festival start tomorrow?)
The plane does not arrive [today]. (The plane does not arrive today.)
4. It is used for instructions (the imperative).

Examples:

Open the window. (Opens the window.)
Eat the vegetables. (Eat the vegetables.)
Do not cry. (Do not cry.)
Do your homework. (Do your homework.)
Call your mother. (Call your mother.)

	Creado por gerson yahir octaviano samano hace más de 5 años

this is an easy summary to remember to be able to remember the present simple