could disvalue
Regular verb: disvalue - disvalued- disvalued

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could disvalue
you could disvalue
she could disvalue
we could disvalue
you could disvalue
they could disvalue 	I could be disvaluing
you could be disvaluing
she could be disvaluing
we could be disvaluing
you could be disvaluing
they could be disvaluing	I could have disvalued
you could have disvalued
she could have disvalued
we could have disvalued
you could have disvalued
they could have disvalued	I could have been disvaluing
you could have been disvaluing
she could have been disvaluing
we could have been disvaluing
you could have been disvaluing
they could have been disvaluing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not disvalue
you could not disvalue
she could not disvalue
we could not disvalue
you could not disvalue
they could not disvalue 	I could not be disvaluing
you could not be disvaluing
she could not be disvaluing
we could not be disvaluing
you could not be disvaluing
they could not be disvaluing	I could not have disvalued
you could not have disvalued
she could not have disvalued
we could not have disvalued
you could not have disvalued
they could not have disvalued	I could not have been disvaluing
you could not have been disvaluing
she could not have been disvaluing
we could not have been disvaluing
you could not have been disvaluing
they could not have been disvaluing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I disvalue?
could you disvalue?
could she disvalue?
could we disvalue?
could you disvalue?
could they disvalue? 	could I be disvaluing?
could you be disvaluing?
could she be disvaluing?
could we be disvaluing?
could you be disvaluing?
could they be disvaluing? 	could I have disvalued?
could you have disvalued?
could she have disvalued?
could we have disvalued?
could you have disvalued?
could they have disvalued? 	could I have been disvaluing?
could you have been disvaluing?
could she have been disvaluing?
could we have been disvaluing?
could you have been disvaluing?
could they have been disvaluing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not disvalue?
could you not disvalue?
could she not disvalue?
could we not disvalue?
could you not disvalue?
could they not disvalue? 	could I not be disvaluing?
could you not be disvaluing?
could she not be disvaluing?
could we not be disvaluing?
could you not be disvaluing?
could they not be disvaluing? 	could I not have disvalued?
could you not have disvalued?
could she not have disvalued?
could we not have disvalued?
could you not have disvalued?
could they not have disvalued? 	could I not have been disvaluing?
could you not have been disvaluing?
could she not have been disvaluing?
could we not have been disvaluing?
could you not have been disvaluing?
could they not have been disvaluing?