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
he could book
we could book
you could book
they could book 	I could be booking
you could be booking
he could be booking
we could be booking
you could be booking
they could be booking	I could have booked
you could have booked
he 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
he 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 couldn't book
you couldn't book
he couldn't book
we couldn't book
you couldn't book
they couldn't book 	I couldn't be booking
you couldn't be booking
he couldn't be booking
we couldn't be booking
you couldn't be booking
they couldn't be booking	I couldn't have booked
you couldn't have booked
he couldn't have booked
we couldn't have booked
you couldn't have booked
they couldn't have booked	I couldn't have been booking
you couldn't have been booking
he couldn't have been booking
we couldn't have been booking
you couldn't have been booking
they couldn't have been booking	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I book?
could you book?
could he book?
could we book?
could you book?
could they book? 	could I be booking?
could you be booking?
could he be booking?
could we be booking?
could you be booking?
could they be booking? 	could I have booked?
could you have booked?
could he 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 he 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 	
couldn't I book?
couldn't you book?
couldn't he book?
couldn't we book?
couldn't you book?
couldn't they book? 	couldn't I be booking?
couldn't you be booking?
couldn't he be booking?
couldn't we be booking?
couldn't you be booking?
couldn't they be booking? 	couldn't I have booked?
couldn't you have booked?
couldn't he have booked?
couldn't we have booked?
couldn't you have booked?
couldn't they have booked? 	couldn't I have been booking?
couldn't you have been booking?
couldn't he have been booking?
couldn't we have been booking?
couldn't you have been booking?
couldn't they have been booking?