English verb conjugation
COULD CROOK

Regular verb: crook - crooked - crooked

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?