Do = Modal auxiliar del presente simple. Como verbo hacer, fabricar, crear.
I do my homework.
We do their works.
They do pay to the boss.
I do cleam my room.
Does = Modal auxiliar del presente simple para 3ras personas. Como verbo hacer, crear.
She does her monography.
It does rain.
He does not clean his face.
Did = Modal auxiliar del pasado simple. Como verbo Hacer, Fabricar pero en pasado.
I did the same as You did
She did sit on the floor.
It did grow with sugar.
Suerte!
