could double-book
Verbe régulier : double-book - double-booked- double-booked

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

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

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

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