English verb conjugation
COULD ENTERTAIN

Regular verb: entertain - entertained - entertained

Affirmation

Simple form	V-ing form
I could entertain you could entertain he could entertain we could entertain you could entertain they could entertain	I could be entertaining you could be entertaining he could be entertaining we could be entertaining you could be entertaining they could be entertaining
Perfect	V-ing perfect
I could have entertained you could have entertained he could have entertained we could have entertained you could have entertained they could have entertained	I could have been entertaining you could have been entertaining he could have been entertaining we could have been entertaining you could have been entertaining they could have been entertaining

Negation

Simple form	V-ing form
I could not entertain you could not entertain he could not entertain we could not entertain you could not entertain they could not entertain	I could not be entertaining you could not be entertaining he could not be entertaining we could not be entertaining you could not be entertaining they could not be entertaining
Perfect	V-ing perfect
I could not have entertained you could not have entertained he could not have entertained we could not have entertained you could not have entertained they could not have entertained	I could not have been entertaining you could not have been entertaining he could not have been entertaining we could not have been entertaining you could not have been entertaining they could not have been entertaining

Interrogative form

Simple form	V-ing form
could I entertain? could you entertain? could he entertain? could we entertain? could you entertain? could they entertain?	could I be entertaining? could you be entertaining? could he be entertaining? could we be entertaining? could you be entertaining? could they be entertaining?
Perfect	V-ing perfect
could I have entertained? could you have entertained? could he have entertained? could we have entertained? could you have entertained? could they have entertained?	could I have been entertaining? could you have been entertaining? could he have been entertaining? could we have been entertaining? could you have been entertaining? could they have been entertaining?

Interro-negative form

Simple form	V-ing form
could I not entertain? could you not entertain? could he not entertain? could we not entertain? could you not entertain? could they not entertain?	could I not be entertaining? could you not be entertaining? could he not be entertaining? could we not be entertaining? could you not be entertaining? could they not be entertaining?
Perfect	V-ing perfect
could I not have entertained? could you not have entertained? could he not have entertained? could we not have entertained? could you not have entertained? could they not have entertained?	could I not have been entertaining? could you not have been entertaining? could he not have been entertaining? could we not have been entertaining? could you not have been entertaining? could they not have been entertaining?