could refuse
Regular verb: refuse - refused- refused

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could refuse
you could refuse
he could refuse
we could refuse
you could refuse
they could refuse 	I could be refusing
you could be refusing
he could be refusing
we could be refusing
you could be refusing
they could be refusing	I could have refused
you could have refused
he could have refused
we could have refused
you could have refused
they could have refused	I could have been refusing
you could have been refusing
he could have been refusing
we could have been refusing
you could have been refusing
they could have been refusing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not refuse
you could not refuse
he could not refuse
we could not refuse
you could not refuse
they could not refuse 	I could not be refusing
you could not be refusing
he could not be refusing
we could not be refusing
you could not be refusing
they could not be refusing	I could not have refused
you could not have refused
he could not have refused
we could not have refused
you could not have refused
they could not have refused	I could not have been refusing
you could not have been refusing
he could not have been refusing
we could not have been refusing
you could not have been refusing
they could not have been refusing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I refuse?
could you refuse?
could he refuse?
could we refuse?
could you refuse?
could they refuse? 	could I be refusing?
could you be refusing?
could he be refusing?
could we be refusing?
could you be refusing?
could they be refusing? 	could I have refused?
could you have refused?
could he have refused?
could we have refused?
could you have refused?
could they have refused? 	could I have been refusing?
could you have been refusing?
could he have been refusing?
could we have been refusing?
could you have been refusing?
could they have been refusing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not refuse?
could you not refuse?
could he not refuse?
could we not refuse?
could you not refuse?
could they not refuse? 	could I not be refusing?
could you not be refusing?
could he not be refusing?
could we not be refusing?
could you not be refusing?
could they not be refusing? 	could I not have refused?
could you not have refused?
could he not have refused?
could we not have refused?
could you not have refused?
could they not have refused? 	could I not have been refusing?
could you not have been refusing?
could he not have been refusing?
could we not have been refusing?
could you not have been refusing?
could they not have been refusing?