could cook
Regular verb: cook - cooked- cooked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could cook
you could cook
he could cook
we could cook
you could cook
they could cook 	I could be cooking
you could be cooking
he could be cooking
we could be cooking
you could be cooking
they could be cooking	I could have cooked
you could have cooked
he could have cooked
we could have cooked
you could have cooked
they could have cooked	I could have been cooking
you could have been cooking
he could have been cooking
we could have been cooking
you could have been cooking
they could have been cooking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not cook
you could not cook
he could not cook
we could not cook
you could not cook
they could not cook 	I could not be cooking
you could not be cooking
he could not be cooking
we could not be cooking
you could not be cooking
they could not be cooking	I could not have cooked
you could not have cooked
he could not have cooked
we could not have cooked
you could not have cooked
they could not have cooked	I could not have been cooking
you could not have been cooking
he could not have been cooking
we could not have been cooking
you could not have been cooking
they could not have been cooking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I cook?
could you cook?
could he cook?
could we cook?
could you cook?
could they cook? 	could I be cooking?
could you be cooking?
could he be cooking?
could we be cooking?
could you be cooking?
could they be cooking? 	could I have cooked?
could you have cooked?
could he have cooked?
could we have cooked?
could you have cooked?
could they have cooked? 	could I have been cooking?
could you have been cooking?
could he have been cooking?
could we have been cooking?
could you have been cooking?
could they have been cooking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not cook?
could you not cook?
could he not cook?
could we not cook?
could you not cook?
could they not cook? 	could I not be cooking?
could you not be cooking?
could he not be cooking?
could we not be cooking?
could you not be cooking?
could they not be cooking? 	could I not have cooked?
could you not have cooked?
could he not have cooked?
could we not have cooked?
could you not have cooked?
could they not have cooked? 	could I not have been cooking?
could you not have been cooking?
could he not have been cooking?
could we not have been cooking?
could you not have been cooking?
could they not have been cooking?