English verb conjugation
CAN CROOK

Regular verb: crook - crooked - crooked

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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