Aff.
I sing
You sing
He/she/it sings
We sing
You sing
They sing
Neg.
I do not sing
You do not sing
He/she/it does not sing
We don't sing
You don't sing
They don't sing
Inter.
Do I sing?
Do you sing?
Does he/she/it sings?
Do we sing?
Do you sing?
Do they sing?
