could supply
Regular verb: supply - supplied- supplied

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could supply
you could supply
he could supply
we could supply
you could supply
they could supply 	I could be supplying
you could be supplying
he could be supplying
we could be supplying
you could be supplying
they could be supplying	I could have supplied
you could have supplied
he could have supplied
we could have supplied
you could have supplied
they could have supplied	I could have been supplying
you could have been supplying
he could have been supplying
we could have been supplying
you could have been supplying
they could have been supplying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't supply
you couldn't supply
he couldn't supply
we couldn't supply
you couldn't supply
they couldn't supply 	I couldn't be supplying
you couldn't be supplying
he couldn't be supplying
we couldn't be supplying
you couldn't be supplying
they couldn't be supplying	I couldn't have supplied
you couldn't have supplied
he couldn't have supplied
we couldn't have supplied
you couldn't have supplied
they couldn't have supplied	I couldn't have been supplying
you couldn't have been supplying
he couldn't have been supplying
we couldn't have been supplying
you couldn't have been supplying
they couldn't have been supplying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I supply?
could you supply?
could he supply?
could we supply?
could you supply?
could they supply? 	could I be supplying?
could you be supplying?
could he be supplying?
could we be supplying?
could you be supplying?
could they be supplying? 	could I have supplied?
could you have supplied?
could he have supplied?
could we have supplied?
could you have supplied?
could they have supplied? 	could I have been supplying?
could you have been supplying?
could he have been supplying?
could we have been supplying?
could you have been supplying?
could they have been supplying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I supply?
couldn't you supply?
couldn't he supply?
couldn't we supply?
couldn't you supply?
couldn't they supply? 	couldn't I be supplying?
couldn't you be supplying?
couldn't he be supplying?
couldn't we be supplying?
couldn't you be supplying?
couldn't they be supplying? 	couldn't I have supplied?
couldn't you have supplied?
couldn't he have supplied?
couldn't we have supplied?
couldn't you have supplied?
couldn't they have supplied? 	couldn't I have been supplying?
couldn't you have been supplying?
couldn't he have been supplying?
couldn't we have been supplying?
couldn't you have been supplying?
couldn't they have been supplying?