Here are the present tense forms of to do, to have and to be, combined with different subjects to show agreement.
Note: You can see from the chart that the words is, has, and does are used only with singular subjects other than I and you.
he does, she does, it does,
(any other singular subject) does
(any other plural subject) do
he has, she has, it has,
(any other singular subject) has
(any other plural subject) have
he is, she is, it is,
(any other singular subject) is
(any other plural subject) are