could dispute
Regular verb: dispute - disputed- disputed

Affirmation 	
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I could dispute
you could dispute
he could dispute
we could dispute
you could dispute
they could dispute 	I could be disputing
you could be disputing
he could be disputing
we could be disputing
you could be disputing
they could be disputing	I could have disputed
you could have disputed
he could have disputed
we could have disputed
you could have disputed
they could have disputed	I could have been disputing
you could have been disputing
he could have been disputing
we could have been disputing
you could have been disputing
they could have been disputing	

Negation 	
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I couldn't dispute
you couldn't dispute
he couldn't dispute
we couldn't dispute
you couldn't dispute
they couldn't dispute 	I couldn't be disputing
you couldn't be disputing
he couldn't be disputing
we couldn't be disputing
you couldn't be disputing
they couldn't be disputing	I couldn't have disputed
you couldn't have disputed
he couldn't have disputed
we couldn't have disputed
you couldn't have disputed
they couldn't have disputed	I couldn't have been disputing
you couldn't have been disputing
he couldn't have been disputing
we couldn't have been disputing
you couldn't have been disputing
they couldn't have been disputing	

Interrogative form 	
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could I dispute?
could you dispute?
could he dispute?
could we dispute?
could you dispute?
could they dispute? 	could I be disputing?
could you be disputing?
could he be disputing?
could we be disputing?
could you be disputing?
could they be disputing? 	could I have disputed?
could you have disputed?
could he have disputed?
could we have disputed?
could you have disputed?
could they have disputed? 	could I have been disputing?
could you have been disputing?
could he have been disputing?
could we have been disputing?
could you have been disputing?
could they have been disputing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I dispute?
couldn't you dispute?
couldn't he dispute?
couldn't we dispute?
couldn't you dispute?
couldn't they dispute? 	couldn't I be disputing?
couldn't you be disputing?
couldn't he be disputing?
couldn't we be disputing?
couldn't you be disputing?
couldn't they be disputing? 	couldn't I have disputed?
couldn't you have disputed?
couldn't he have disputed?
couldn't we have disputed?
couldn't you have disputed?
couldn't they have disputed? 	couldn't I have been disputing?
couldn't you have been disputing?
couldn't he have been disputing?
couldn't we have been disputing?
couldn't you have been disputing?
couldn't they have been disputing?