English verb conjugation
COULD SELL

Irregular verb: sell - sold - sold

Affirmation

Simple form	V-ing form
I could sell you could sell she could sell we could sell you could sell they could sell	I could be selling you could be selling she could be selling we could be selling you could be selling they could be selling
Perfect	V-ing perfect
I could have sold you could have sold she could have sold we could have sold you could have sold they could have sold	I could have been selling you could have been selling she could have been selling we could have been selling you could have been selling they could have been selling

Negation

Simple form	V-ing form
I could not sell you could not sell she could not sell we could not sell you could not sell they could not sell	I could not be selling you could not be selling she could not be selling we could not be selling you could not be selling they could not be selling
Perfect	V-ing perfect
I could not have sold you could not have sold she could not have sold we could not have sold you could not have sold they could not have sold	I could not have been selling you could not have been selling she could not have been selling we could not have been selling you could not have been selling they could not have been selling

Interrogative form

Simple form	V-ing form
could I sell? could you sell? could she sell? could we sell? could you sell? could they sell?	could I be selling? could you be selling? could she be selling? could we be selling? could you be selling? could they be selling?
Perfect	V-ing perfect
could I have sold? could you have sold? could she have sold? could we have sold? could you have sold? could they have sold?	could I have been selling? could you have been selling? could she have been selling? could we have been selling? could you have been selling? could they have been selling?

Interro-negative form

Simple form	V-ing form
could I not sell? could you not sell? could she not sell? could we not sell? could you not sell? could they not sell?	could I not be selling? could you not be selling? could she not be selling? could we not be selling? could you not be selling? could they not be selling?
Perfect	V-ing perfect
could I not have sold? could you not have sold? could she not have sold? could we not have sold? could you not have sold? could they not have sold?	could I not have been selling? could you not have been selling? could she not have been selling? could we not have been selling? could you not have been selling? could they not have been selling?