simple present tense

affirmative
subject+verb+complement.
i,you,we,they+verb base form+complement.

affirmative
subject+verb+complement.
she,he,it+verb+s+complement.

negative
subject+don´t+verb base form+complement
i,you,we,they

negative
subject+doesn´t+verb base form+complement
she.he,it

question
do+subject+verb base form+complement+?
i,you,we,they

does+subject+verb base form+complement+?
she,he,it