could cox
Regular verb: cox - coxed- coxed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could cox
you could cox
he could cox
we could cox
you could cox
they could cox 	I could be coxing
you could be coxing
he could be coxing
we could be coxing
you could be coxing
they could be coxing	I could have coxed
you could have coxed
he could have coxed
we could have coxed
you could have coxed
they could have coxed	I could have been coxing
you could have been coxing
he could have been coxing
we could have been coxing
you could have been coxing
they could have been coxing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not cox
you could not cox
he could not cox
we could not cox
you could not cox
they could not cox 	I could not be coxing
you could not be coxing
he could not be coxing
we could not be coxing
you could not be coxing
they could not be coxing	I could not have coxed
you could not have coxed
he could not have coxed
we could not have coxed
you could not have coxed
they could not have coxed	I could not have been coxing
you could not have been coxing
he could not have been coxing
we could not have been coxing
you could not have been coxing
they could not have been coxing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I cox?
could you cox?
could he cox?
could we cox?
could you cox?
could they cox? 	could I be coxing?
could you be coxing?
could he be coxing?
could we be coxing?
could you be coxing?
could they be coxing? 	could I have coxed?
could you have coxed?
could he have coxed?
could we have coxed?
could you have coxed?
could they have coxed? 	could I have been coxing?
could you have been coxing?
could he have been coxing?
could we have been coxing?
could you have been coxing?
could they have been coxing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not cox?
could you not cox?
could he not cox?
could we not cox?
could you not cox?
could they not cox? 	could I not be coxing?
could you not be coxing?
could he not be coxing?
could we not be coxing?
could you not be coxing?
could they not be coxing? 	could I not have coxed?
could you not have coxed?
could he not have coxed?
could we not have coxed?
could you not have coxed?
could they not have coxed? 	could I not have been coxing?
could you not have been coxing?
could he not have been coxing?
could we not have been coxing?
could you not have been coxing?
could they not have been coxing?