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 cannot crook you cannot crook he cannot crook we cannot crook you cannot crook they cannot crook	I cannot be crooking you cannot be crooking he cannot be crooking we cannot be crooking you cannot be crooking they cannot be crooking
Perfect	V-ing perfect
I cannot have crooked you cannot have crooked he cannot have crooked we cannot have crooked you cannot have crooked they cannot have crooked	I cannot have been crooking you cannot have been crooking he cannot have been crooking we cannot have been crooking you cannot have been crooking they cannot 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 I not crook? can you not crook? can he not crook? can we not crook? can you not crook? can they not crook?	can I not be crooking? can you not be crooking? can he not be crooking? can we not be crooking? can you not be crooking? can they not be crooking?
Perfect	V-ing perfect
can I not have crooked? can you not have crooked? can he not have crooked? can we not have crooked? can you not have crooked? can they not have crooked?	can I not have been crooking? can you not have been crooking? can he not have been crooking? can we not have been crooking? can you not have been crooking? can they not have been crooking?