could revalue
Regular verb: revalue - revalued- revalued

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could revalue
you could revalue
he could revalue
we could revalue
you could revalue
they could revalue 	I could be revaluing
you could be revaluing
he could be revaluing
we could be revaluing
you could be revaluing
they could be revaluing	I could have revalued
you could have revalued
he could have revalued
we could have revalued
you could have revalued
they could have revalued	I could have been revaluing
you could have been revaluing
he could have been revaluing
we could have been revaluing
you could have been revaluing
they could have been revaluing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't revalue
you couldn't revalue
he couldn't revalue
we couldn't revalue
you couldn't revalue
they couldn't revalue 	I couldn't be revaluing
you couldn't be revaluing
he couldn't be revaluing
we couldn't be revaluing
you couldn't be revaluing
they couldn't be revaluing	I couldn't have revalued
you couldn't have revalued
he couldn't have revalued
we couldn't have revalued
you couldn't have revalued
they couldn't have revalued	I couldn't have been revaluing
you couldn't have been revaluing
he couldn't have been revaluing
we couldn't have been revaluing
you couldn't have been revaluing
they couldn't have been revaluing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I revalue?
could you revalue?
could he revalue?
could we revalue?
could you revalue?
could they revalue? 	could I be revaluing?
could you be revaluing?
could he be revaluing?
could we be revaluing?
could you be revaluing?
could they be revaluing? 	could I have revalued?
could you have revalued?
could he have revalued?
could we have revalued?
could you have revalued?
could they have revalued? 	could I have been revaluing?
could you have been revaluing?
could he have been revaluing?
could we have been revaluing?
could you have been revaluing?
could they have been revaluing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I revalue?
couldn't you revalue?
couldn't he revalue?
couldn't we revalue?
couldn't you revalue?
couldn't they revalue? 	couldn't I be revaluing?
couldn't you be revaluing?
couldn't he be revaluing?
couldn't we be revaluing?
couldn't you be revaluing?
couldn't they be revaluing? 	couldn't I have revalued?
couldn't you have revalued?
couldn't he have revalued?
couldn't we have revalued?
couldn't you have revalued?
couldn't they have revalued? 	couldn't I have been revaluing?
couldn't you have been revaluing?
couldn't he have been revaluing?
couldn't we have been revaluing?
couldn't you have been revaluing?
couldn't they have been revaluing?