Present simple tvori se od glagola + nastavak –s, a za 3. lice jednine je nastavak -es
nastavak –es dodajemo glagolima koji:
1) završavaju slovom – o
go + s = goes

2) završavaju slovom ili glasom – ch, -sh, - s, -x ili – z
watch + s = watches
wash + s = washes
slice + s = slices (c = /s/)
fix + s = fixes
lose + s = loses (s = /z/)

3) završavaju slovom –y ispred kojeg je suglasnik
fly + s = flies

Za niječne i upitne rečenice koristimo pomoćni glagol do odnosno does za treće lice

Evo primjer nadam se da ćeš shvatiti
izjavna:
I visit my grandmother every week.
He visits his grandfather on Saturdays.

niječna:
We do not visit our grandmother every week.
We don't visit our grandmother every week.

She does not visit her grandfather on Saturdays.
She doesn't visit her grandfather on Saturdays.

upitna:
Do you often visit your grandparents? Yes, I do. No, I don't.
Does it snow on Alaska? Yes, it does. No, it doesn't.
Where do you shop every day?
Why does he travel in May?


Na ovom linku možeš naći još primjera i zadatke za vježbu:
https://www.perfect-english-grammar.com/present-simple.html