could corn
Regular verb: corn - corned- corned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could corn
you could corn
she could corn
we could corn
you could corn
they could corn 	I could be corning
you could be corning
she could be corning
we could be corning
you could be corning
they could be corning	I could have corned
you could have corned
she could have corned
we could have corned
you could have corned
they could have corned	I could have been corning
you could have been corning
she could have been corning
we could have been corning
you could have been corning
they could have been corning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't corn
you couldn't corn
she couldn't corn
we couldn't corn
you couldn't corn
they couldn't corn 	I couldn't be corning
you couldn't be corning
she couldn't be corning
we couldn't be corning
you couldn't be corning
they couldn't be corning	I couldn't have corned
you couldn't have corned
she couldn't have corned
we couldn't have corned
you couldn't have corned
they couldn't have corned	I couldn't have been corning
you couldn't have been corning
she couldn't have been corning
we couldn't have been corning
you couldn't have been corning
they couldn't have been corning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I corn?
could you corn?
could she corn?
could we corn?
could you corn?
could they corn? 	could I be corning?
could you be corning?
could she be corning?
could we be corning?
could you be corning?
could they be corning? 	could I have corned?
could you have corned?
could she have corned?
could we have corned?
could you have corned?
could they have corned? 	could I have been corning?
could you have been corning?
could she have been corning?
could we have been corning?
could you have been corning?
could they have been corning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I corn?
couldn't you corn?
couldn't she corn?
couldn't we corn?
couldn't you corn?
couldn't they corn? 	couldn't I be corning?
couldn't you be corning?
couldn't she be corning?
couldn't we be corning?
couldn't you be corning?
couldn't they be corning? 	couldn't I have corned?
couldn't you have corned?
couldn't she have corned?
couldn't we have corned?
couldn't you have corned?
couldn't they have corned? 	couldn't I have been corning?
couldn't you have been corning?
couldn't she have been corning?
couldn't we have been corning?
couldn't you have been corning?
couldn't they have been corning?