could chance
Regular verb: chance - chanced- chanced

Affirmation 	
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I could chance
you could chance
he could chance
we could chance
you could chance
they could chance 	I could be chancing
you could be chancing
he could be chancing
we could be chancing
you could be chancing
they could be chancing	I could have chanced
you could have chanced
he could have chanced
we could have chanced
you could have chanced
they could have chanced	I could have been chancing
you could have been chancing
he could have been chancing
we could have been chancing
you could have been chancing
they could have been chancing	

Negation 	
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I could not chance
you could not chance
he could not chance
we could not chance
you could not chance
they could not chance 	I could not be chancing
you could not be chancing
he could not be chancing
we could not be chancing
you could not be chancing
they could not be chancing	I could not have chanced
you could not have chanced
he could not have chanced
we could not have chanced
you could not have chanced
they could not have chanced	I could not have been chancing
you could not have been chancing
he could not have been chancing
we could not have been chancing
you could not have been chancing
they could not have been chancing	

Interrogative form 	
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could I chance?
could you chance?
could he chance?
could we chance?
could you chance?
could they chance? 	could I be chancing?
could you be chancing?
could he be chancing?
could we be chancing?
could you be chancing?
could they be chancing? 	could I have chanced?
could you have chanced?
could he have chanced?
could we have chanced?
could you have chanced?
could they have chanced? 	could I have been chancing?
could you have been chancing?
could he have been chancing?
could we have been chancing?
could you have been chancing?
could they have been chancing? 	

Interro-negative form 	
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could I not chance?
could you not chance?
could he not chance?
could we not chance?
could you not chance?
could they not chance? 	could I not be chancing?
could you not be chancing?
could he not be chancing?
could we not be chancing?
could you not be chancing?
could they not be chancing? 	could I not have chanced?
could you not have chanced?
could he not have chanced?
could we not have chanced?
could you not have chanced?
could they not have chanced? 	could I not have been chancing?
could you not have been chancing?
could he not have been chancing?
could we not have been chancing?
could you not have been chancing?
could they not have been chancing?