could overcook
Regular verb: overcook - overcooked- overcooked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could overcook
you could overcook
he could overcook
we could overcook
you could overcook
they could overcook 	I could be overcooking
you could be overcooking
he could be overcooking
we could be overcooking
you could be overcooking
they could be overcooking	I could have overcooked
you could have overcooked
he could have overcooked
we could have overcooked
you could have overcooked
they could have overcooked	I could have been overcooking
you could have been overcooking
he could have been overcooking
we could have been overcooking
you could have been overcooking
they could have been overcooking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't overcook
you couldn't overcook
he couldn't overcook
we couldn't overcook
you couldn't overcook
they couldn't overcook 	I couldn't be overcooking
you couldn't be overcooking
he couldn't be overcooking
we couldn't be overcooking
you couldn't be overcooking
they couldn't be overcooking	I couldn't have overcooked
you couldn't have overcooked
he couldn't have overcooked
we couldn't have overcooked
you couldn't have overcooked
they couldn't have overcooked	I couldn't have been overcooking
you couldn't have been overcooking
he couldn't have been overcooking
we couldn't have been overcooking
you couldn't have been overcooking
they couldn't have been overcooking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I overcook?
could you overcook?
could he overcook?
could we overcook?
could you overcook?
could they overcook? 	could I be overcooking?
could you be overcooking?
could he be overcooking?
could we be overcooking?
could you be overcooking?
could they be overcooking? 	could I have overcooked?
could you have overcooked?
could he have overcooked?
could we have overcooked?
could you have overcooked?
could they have overcooked? 	could I have been overcooking?
could you have been overcooking?
could he have been overcooking?
could we have been overcooking?
could you have been overcooking?
could they have been overcooking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I overcook?
couldn't you overcook?
couldn't he overcook?
couldn't we overcook?
couldn't you overcook?
couldn't they overcook? 	couldn't I be overcooking?
couldn't you be overcooking?
couldn't he be overcooking?
couldn't we be overcooking?
couldn't you be overcooking?
couldn't they be overcooking? 	couldn't I have overcooked?
couldn't you have overcooked?
couldn't he have overcooked?
couldn't we have overcooked?
couldn't you have overcooked?
couldn't they have overcooked? 	couldn't I have been overcooking?
couldn't you have been overcooking?
couldn't he have been overcooking?
couldn't we have been overcooking?
couldn't you have been overcooking?
couldn't they have been overcooking?