The word ‘do’ is generally used in relation to pleural terms and with the word ‘I’. Examples are as following –
We do not like cats.
They do not want corruption.
I do make sandwiches.
These books do not have a index page at the end.
Whereas the word ‘does’ is used in relation to singular things. Following are few examples –
He does not love oranges.
She does read novels in her free time.
It does not look good.
One does not need to be a doctor to do humanitarian work.
Hope the above examples will prove useful.