English verb conjugation
CAN BOOK

Regular verb: book - booked - booked

Affirmation

Simple form	V-ing form
I can book you can book he can book we can book you can book they can book	I can be booking you can be booking he can be booking we can be booking you can be booking they can be booking
Perfect	V-ing perfect
I can have booked you can have booked he can have booked we can have booked you can have booked they can have booked	I can have been booking you can have been booking he can have been booking we can have been booking you can have been booking they can have been booking

Negation

Simple form	V-ing form
I can't book you can't book he can't book we can't book you can't book they can't book	I can't be booking you can't be booking he can't be booking we can't be booking you can't be booking they can't be booking
Perfect	V-ing perfect
I can't have booked you can't have booked he can't have booked we can't have booked you can't have booked they can't have booked	I can't have been booking you can't have been booking he can't have been booking we can't have been booking you can't have been booking they can't have been booking

Interrogative form

Simple form	V-ing form
can I book? can you book? can he book? can we book? can you book? can they book?	can I be booking? can you be booking? can he be booking? can we be booking? can you be booking? can they be booking?
Perfect	V-ing perfect
can I have booked? can you have booked? can he have booked? can we have booked? can you have booked? can they have booked?	can I have been booking? can you have been booking? can he have been booking? can we have been booking? can you have been booking? can they have been booking?

Interro-negative form

Simple form	V-ing form
can't I book? can't you book? can't he book? can't we book? can't you book? can't they book?	can't I be booking? can't you be booking? can't he be booking? can't we be booking? can't you be booking? can't they be booking?
Perfect	V-ing perfect
can't I have booked? can't you have booked? can't he have booked? can't we have booked? can't you have booked? can't they have booked?	can't I have been booking? can't you have been booking? can't he have been booking? can't we have been booking? can't you have been booking? can't they have been booking?