Present Simple

The Present Simple tense is used to describe habits, routines, general truths, and facts.

STRUCTURE

POSITIVE:
(+) SUBJECT + VERB (Present simple) + COMPLEMENT.

NEGATIVE:
(-) SUBJECT + AUXILIAR DO/DOES + NOT + VERB (Infinitive) + COMPLEMENT.

INTERROGATIVE:
(?) AUXILIAR DO/DOES + SUBJECT + VERB (Infinitive) + COMPLEMENT?

AUXILIAR DO/DOES CONJUGATION
I - DO
YOU - DO
HE - DOES
SHE - DOES
IT - DOES
WE - DO
YOU - DO
THEY - DO

The rule "s" in present simple with HE - SHE - IT pronouns

For most verbs we add -s to the base form to make the she, he, it (third person singular) form:

come → comes / order → orders / travel → travels / eat → eats / record → records / walk → walks

For other verbs, the spelling changes are:
When the verb ends in -ch, -ss, -sh, -x or -zz, we add -es.

watch - watches / miss - misses / wash - washes / mix - mixes / buzz - buzzes

When the verb ends in a consonant + -y we change y to i and add -es.

hurry - hurries / study - studies / reply - replies

But when the verb ends in a vowel + -y we just add -s.

pay - pays / enjoy - enjoys

Have, go, do and be are irregular.

have - has / go - goes / do - does / be - is, am, are.

When the verb ends in -s or -z we double the -s or -z and add -es,

Quiz, quizzes.

EXAMPLES:

(+) I study for the English class.
(-) I do not study for the English class.
(?) Do I study for the English class?

(+) He plays the guitar.
(-) He does not play the guitar.
(?) Does he play the guitar?