could buoy
Regular verb: buoy - buoyed- buoyed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could buoy
you could buoy
he could buoy
we could buoy
you could buoy
they could buoy 	I could be buoying
you could be buoying
he could be buoying
we could be buoying
you could be buoying
they could be buoying	I could have buoyed
you could have buoyed
he could have buoyed
we could have buoyed
you could have buoyed
they could have buoyed	I could have been buoying
you could have been buoying
he could have been buoying
we could have been buoying
you could have been buoying
they could have been buoying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't buoy
you couldn't buoy
he couldn't buoy
we couldn't buoy
you couldn't buoy
they couldn't buoy 	I couldn't be buoying
you couldn't be buoying
he couldn't be buoying
we couldn't be buoying
you couldn't be buoying
they couldn't be buoying	I couldn't have buoyed
you couldn't have buoyed
he couldn't have buoyed
we couldn't have buoyed
you couldn't have buoyed
they couldn't have buoyed	I couldn't have been buoying
you couldn't have been buoying
he couldn't have been buoying
we couldn't have been buoying
you couldn't have been buoying
they couldn't have been buoying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I buoy?
could you buoy?
could he buoy?
could we buoy?
could you buoy?
could they buoy? 	could I be buoying?
could you be buoying?
could he be buoying?
could we be buoying?
could you be buoying?
could they be buoying? 	could I have buoyed?
could you have buoyed?
could he have buoyed?
could we have buoyed?
could you have buoyed?
could they have buoyed? 	could I have been buoying?
could you have been buoying?
could he have been buoying?
could we have been buoying?
could you have been buoying?
could they have been buoying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I buoy?
couldn't you buoy?
couldn't he buoy?
couldn't we buoy?
couldn't you buoy?
couldn't they buoy? 	couldn't I be buoying?
couldn't you be buoying?
couldn't he be buoying?
couldn't we be buoying?
couldn't you be buoying?
couldn't they be buoying? 	couldn't I have buoyed?
couldn't you have buoyed?
couldn't he have buoyed?
couldn't we have buoyed?
couldn't you have buoyed?
couldn't they have buoyed? 	couldn't I have been buoying?
couldn't you have been buoying?
couldn't he have been buoying?
couldn't we have been buoying?
couldn't you have been buoying?
couldn't they have been buoying?