could crook
Regular verb: crook - crooked- crooked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could crook
you could crook
he could crook
we could crook
you could crook
they could crook 	I could be crooking
you could be crooking
he could be crooking
we could be crooking
you could be crooking
they could be crooking	I could have crooked
you could have crooked
he could have crooked
we could have crooked
you could have crooked
they could have crooked	I could have been crooking
you could have been crooking
he could have been crooking
we could have been crooking
you could have been crooking
they could have been crooking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't crook
you couldn't crook
he couldn't crook
we couldn't crook
you couldn't crook
they couldn't crook 	I couldn't be crooking
you couldn't be crooking
he couldn't be crooking
we couldn't be crooking
you couldn't be crooking
they couldn't be crooking	I couldn't have crooked
you couldn't have crooked
he couldn't have crooked
we couldn't have crooked
you couldn't have crooked
they couldn't have crooked	I couldn't have been crooking
you couldn't have been crooking
he couldn't have been crooking
we couldn't have been crooking
you couldn't have been crooking
they couldn't have been crooking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I crook?
could you crook?
could he crook?
could we crook?
could you crook?
could they crook? 	could I be crooking?
could you be crooking?
could he be crooking?
could we be crooking?
could you be crooking?
could they be crooking? 	could I have crooked?
could you have crooked?
could he have crooked?
could we have crooked?
could you have crooked?
could they have crooked? 	could I have been crooking?
could you have been crooking?
could he have been crooking?
could we have been crooking?
could you have been crooking?
could they have been crooking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I crook?
couldn't you crook?
couldn't he crook?
couldn't we crook?
couldn't you crook?
couldn't they crook? 	couldn't I be crooking?
couldn't you be crooking?
couldn't he be crooking?
couldn't we be crooking?
couldn't you be crooking?
couldn't they be crooking? 	couldn't I have crooked?
couldn't you have crooked?
couldn't he have crooked?
couldn't we have crooked?
couldn't you have crooked?
couldn't they have crooked? 	couldn't I have been crooking?
couldn't you have been crooking?
couldn't he have been crooking?
couldn't we have been crooking?
couldn't you have been crooking?
couldn't they have been crooking?