could sell
Irregular verb: sell - sold- sold

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
I couldn't sell
you couldn't sell
she couldn't sell
we couldn't sell
you couldn't sell
they couldn't sell 	I couldn't be selling
you couldn't be selling
she couldn't be selling
we couldn't be selling
you couldn't be selling
they couldn't be selling	I couldn't have sold
you couldn't have sold
she couldn't have sold
we couldn't have sold
you couldn't have sold
they couldn't have sold	I couldn't have been selling
you couldn't have been selling
she couldn't have been selling
we couldn't have been selling
you couldn't have been selling
they couldn't have been selling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
couldn't I sell?
couldn't you sell?
couldn't she sell?
couldn't we sell?
couldn't you sell?
couldn't they sell? 	couldn't I be selling?
couldn't you be selling?
couldn't she be selling?
couldn't we be selling?
couldn't you be selling?
couldn't they be selling? 	couldn't I have sold?
couldn't you have sold?
couldn't she have sold?
couldn't we have sold?
couldn't you have sold?
couldn't they have sold? 	couldn't I have been selling?
couldn't you have been selling?
couldn't she have been selling?
couldn't we have been selling?
couldn't you have been selling?
couldn't they have been selling?