must double-book
Verbe régulier : double-book - double-booked- double-booked

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must double-book
you must double-book
he must double-book
we must double-book
you must double-book
they must double-book 	I must be double-booking
you must be double-booking
he must be double-booking
we must be double-booking
you must be double-booking
they must be double-booking	I must have double-booked
you must have double-booked
he must have double-booked
we must have double-booked
you must have double-booked
they must have double-booked	I must have been double-booking
you must have been double-booking
he must have been double-booking
we must have been double-booking
you must have been double-booking
they must have been double-booking	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't double-book
you mustn't double-book
he mustn't double-book
we mustn't double-book
you mustn't double-book
they mustn't double-book 	I mustn't be double-booking
you mustn't be double-booking
he mustn't be double-booking
we mustn't be double-booking
you mustn't be double-booking
they mustn't be double-booking	I mustn't have double-booked
you mustn't have double-booked
he mustn't have double-booked
we mustn't have double-booked
you mustn't have double-booked
they mustn't have double-booked	I mustn't have been double-booking
you mustn't have been double-booking
he mustn't have been double-booking
we mustn't have been double-booking
you mustn't have been double-booking
they mustn't have been double-booking	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I double-book?
must you double-book?
must he double-book?
must we double-book?
must you double-book?
must they double-book? 	must I be double-booking?
must you be double-booking?
must he be double-booking?
must we be double-booking?
must you be double-booking?
must they be double-booking? 	must I have double-booked?
must you have double-booked?
must he have double-booked?
must we have double-booked?
must you have double-booked?
must they have double-booked? 	must I have been double-booking?
must you have been double-booking?
must he have been double-booking?
must we have been double-booking?
must you have been double-booking?
must they have been double-booking? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I double-book?
mustn't you double-book?
mustn't he double-book?
mustn't we double-book?
mustn't you double-book?
mustn't they double-book? 	mustn't I be double-booking?
mustn't you be double-booking?
mustn't he be double-booking?
mustn't we be double-booking?
mustn't you be double-booking?
mustn't they be double-booking? 	mustn't I have double-booked?
mustn't you have double-booked?
mustn't he have double-booked?
mustn't we have double-booked?
mustn't you have double-booked?
mustn't they have double-booked? 	mustn't I have been double-booking?
mustn't you have been double-booking?
mustn't he have been double-booking?
mustn't we have been double-booking?
mustn't you have been double-booking?
mustn't they have been double-booking?