Present simple

Use
Things we do regularly (routines, habits);
Ex.: I get up at 7 o’clock in the morning.
Permanent situations;
Ex.: They live in London.
Things that are true in general.
Ex.: Spiders have eight legs.

Form
Ex.: I go to gym every Sunday.
He goes to gym every Monday.
They don’t speak Spanish.
She doesn’t speak Japanese.

Spelling rules for he, she, it
+ -s
Ex.: cook -> cooks, live ->lives, play ->plays
Verbs ending in -s, -sh, -ch, -x, -o + -es
Ex.: miss -> misses, watch ->watches, fix ->fixes
brush -> brushes, go ->goes
Verbs ending in a consonant + -y: change the –y to –ies
Ex.: carry -> carries, study -> studies
Verbs have , be are irregular.
Ex: have -> has, be -> am, is, are

Form

Present Simple and adverbs of frequency
In affirmative (+) sentences we put the adverb between the subject and the verb, but after the verb be.
Ex.: He usually arrives on time.
He is never late.
In negative sentences we put always, usually, often between don’t / doesn’t and the verb.
Ex.: We don’t usually have geography on Tuesdays.
He doesn’t often go to parties.