We use the word does to tell about one person, place, or thing.
He does the dishes after dinner.
My brother does the chores in the house.
She does a lot of reading at night.
We use the word do to tell about more than one person, place, or thing.
We also use the word do with the words you and I.
I do the dishes after dinner.
We all do chores in the house.
They do a lot of reading at school.