can double-book
Regular verb: double-book - double-booked- double-booked

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

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

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

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