(+) I, you, we, they = hele werkwoordI walk every day.
she, he, it = hele werkwoord+s
She walks every day.
(-) I, you, we, they = don't + hele werkwoord
I don't walk every day.
she, he, it = doesn't +hele werkwoord
She doesn't walk every day.
(?) I, you, we, they = Do.....hele werkwoord?
Do I walk every day?
she, he, it = Does ......hele werkwoord?
Does she walk every day?