A verb can have two forms in positive (play/plays). In negative and question the form is only the simple form (play) because of the AUXILIARIES.
Auxiliaries (Do / Does --- don't / doesn't)
Do and does for questions and don't and doesn't for negatives.
Nota:
Recuerden que auxiliares ayudaran al verbo; es decir, el verbo no se conjugara cuando esten los auxiliares.
Negative form:
He / She / It --- doesn't (does + not) + verb in simple form {play}
I / We / You / They ---- don't (do + not) + verb in simple form {run}
* Como vemos, el verbo no se conjuga pero el "auxiliary" si
(+) I live in Surco -------------------- (-) I don't live in Lima
(+) Gianina works in Paris ----------- (-) She doesn't work in Italy
(+)My Parents study French -------- (-) They don't study Spanish
* Si tenemos, " Mi hermana no quiere pizza" Entonces como se dice querer en ingles? => to want
entonces => My sister doesn't want pizza.
Question form:
In question forms (in present tense) we use the auxiliaries DO and DOES
Does (he/she/it) simple form {work} all day?
Do (you/they/I) simple form {play} the guitar?
(+) I live in Surco -------------------- (-) Do you live in Surco?
(+) Gianina cooks well --------------- (-) Does Gianina cook well?
(+) My brothers play chess---------- (-) Do they play chess?
Also we can put a Question Word before the auxiliary. This gives us the following order:
When do we use Present Simple?
To describe repeated actions or habits : I get up at seven every morning
To talk about things that are always or generally true : The sun sets in the west
To describe a permanent situation or a condition with no definite start or finish but which is true now : We live in London
With adverbs of frequency such as always, usually, … She often studies in the library
With time expressions such as every day/ week/ year, in the morning/ afternoon/ evening and at night: I go to the gym once a week
To express future meaning with actions and events that are part of a fixed timetable: The train leaves at 8’30