could overpower
Regular verb: overpower - overpowered- overpowered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could overpower
you could overpower
he could overpower
we could overpower
you could overpower
they could overpower 	I could be overpowering
you could be overpowering
he could be overpowering
we could be overpowering
you could be overpowering
they could be overpowering	I could have overpowered
you could have overpowered
he could have overpowered
we could have overpowered
you could have overpowered
they could have overpowered	I could have been overpowering
you could have been overpowering
he could have been overpowering
we could have been overpowering
you could have been overpowering
they could have been overpowering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't overpower
you couldn't overpower
he couldn't overpower
we couldn't overpower
you couldn't overpower
they couldn't overpower 	I couldn't be overpowering
you couldn't be overpowering
he couldn't be overpowering
we couldn't be overpowering
you couldn't be overpowering
they couldn't be overpowering	I couldn't have overpowered
you couldn't have overpowered
he couldn't have overpowered
we couldn't have overpowered
you couldn't have overpowered
they couldn't have overpowered	I couldn't have been overpowering
you couldn't have been overpowering
he couldn't have been overpowering
we couldn't have been overpowering
you couldn't have been overpowering
they couldn't have been overpowering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I overpower?
could you overpower?
could he overpower?
could we overpower?
could you overpower?
could they overpower? 	could I be overpowering?
could you be overpowering?
could he be overpowering?
could we be overpowering?
could you be overpowering?
could they be overpowering? 	could I have overpowered?
could you have overpowered?
could he have overpowered?
could we have overpowered?
could you have overpowered?
could they have overpowered? 	could I have been overpowering?
could you have been overpowering?
could he have been overpowering?
could we have been overpowering?
could you have been overpowering?
could they have been overpowering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I overpower?
couldn't you overpower?
couldn't he overpower?
couldn't we overpower?
couldn't you overpower?
couldn't they overpower? 	couldn't I be overpowering?
couldn't you be overpowering?
couldn't he be overpowering?
couldn't we be overpowering?
couldn't you be overpowering?
couldn't they be overpowering? 	couldn't I have overpowered?
couldn't you have overpowered?
couldn't he have overpowered?
couldn't we have overpowered?
couldn't you have overpowered?
couldn't they have overpowered? 	couldn't I have been overpowering?
couldn't you have been overpowering?
couldn't he have been overpowering?
couldn't we have been overpowering?
couldn't you have been overpowering?
couldn't they have been overpowering?