could book
Verbo regolare: book - booked- booked

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could book
you could book
she could book
we could book
you could book
they could book 	I could be booking
you could be booking
she could be booking
we could be booking
you could be booking
they could be booking	I could have booked
you could have booked
she could have booked
we could have booked
you could have booked
they could have booked	I could have been booking
you could have been booking
she could have been booking
we could have been booking
you could have been booking
they could have been booking	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could not book
you could not book
she could not book
we could not book
you could not book
they could not book 	I could not be booking
you could not be booking
she could not be booking
we could not be booking
you could not be booking
they could not be booking	I could not have booked
you could not have booked
she could not have booked
we could not have booked
you could not have booked
they could not have booked	I could not have been booking
you could not have been booking
she could not have been booking
we could not have been booking
you could not have been booking
they could not have been booking	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I book?
could you book?
could she book?
could we book?
could you book?
could they book? 	could I be booking?
could you be booking?
could she be booking?
could we be booking?
could you be booking?
could they be booking? 	could I have booked?
could you have booked?
could she have booked?
could we have booked?
could you have booked?
could they have booked? 	could I have been booking?
could you have been booking?
could she have been booking?
could we have been booking?
could you have been booking?
could they have been booking? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I not book?
could you not book?
could she not book?
could we not book?
could you not book?
could they not book? 	could I not be booking?
could you not be booking?
could she not be booking?
could we not be booking?
could you not be booking?
could they not be booking? 	could I not have booked?
could you not have booked?
could she not have booked?
could we not have booked?
could you not have booked?
could they not have booked? 	could I not have been booking?
could you not have been booking?
could she not have been booking?
could we not have been booking?
could you not have been booking?
could they not have been booking?