could canton
Regular verb: canton - cantoned- cantoned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could canton
you could canton
he could canton
we could canton
you could canton
they could canton 	I could be cantoning
you could be cantoning
he could be cantoning
we could be cantoning
you could be cantoning
they could be cantoning	I could have cantoned
you could have cantoned
he could have cantoned
we could have cantoned
you could have cantoned
they could have cantoned	I could have been cantoning
you could have been cantoning
he could have been cantoning
we could have been cantoning
you could have been cantoning
they could have been cantoning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't canton
you couldn't canton
he couldn't canton
we couldn't canton
you couldn't canton
they couldn't canton 	I couldn't be cantoning
you couldn't be cantoning
he couldn't be cantoning
we couldn't be cantoning
you couldn't be cantoning
they couldn't be cantoning	I couldn't have cantoned
you couldn't have cantoned
he couldn't have cantoned
we couldn't have cantoned
you couldn't have cantoned
they couldn't have cantoned	I couldn't have been cantoning
you couldn't have been cantoning
he couldn't have been cantoning
we couldn't have been cantoning
you couldn't have been cantoning
they couldn't have been cantoning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I canton?
could you canton?
could he canton?
could we canton?
could you canton?
could they canton? 	could I be cantoning?
could you be cantoning?
could he be cantoning?
could we be cantoning?
could you be cantoning?
could they be cantoning? 	could I have cantoned?
could you have cantoned?
could he have cantoned?
could we have cantoned?
could you have cantoned?
could they have cantoned? 	could I have been cantoning?
could you have been cantoning?
could he have been cantoning?
could we have been cantoning?
could you have been cantoning?
could they have been cantoning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I canton?
couldn't you canton?
couldn't he canton?
couldn't we canton?
couldn't you canton?
couldn't they canton? 	couldn't I be cantoning?
couldn't you be cantoning?
couldn't he be cantoning?
couldn't we be cantoning?
couldn't you be cantoning?
couldn't they be cantoning? 	couldn't I have cantoned?
couldn't you have cantoned?
couldn't he have cantoned?
couldn't we have cantoned?
couldn't you have cantoned?
couldn't they have cantoned? 	couldn't I have been cantoning?
couldn't you have been cantoning?
couldn't he have been cantoning?
couldn't we have been cantoning?
couldn't you have been cantoning?
couldn't they have been cantoning?