should book
Verbo regular: book - booked- booked

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should book
you should book
he should book
we should book
you should book
they should book 	I should be booking
you should be booking
he should be booking
we should be booking
you should be booking
they should be booking	I should have booked
you should have booked
he should have booked
we should have booked
you should have booked
they should have booked	I should have been booking
you should have been booking
he should have been booking
we should have been booking
you should have been booking
they should have been booking	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should not book
you should not book
he should not book
we should not book
you should not book
they should not book 	I should not be booking
you should not be booking
he should not be booking
we should not be booking
you should not be booking
they should not be booking	I should not have booked
you should not have booked
he should not have booked
we should not have booked
you should not have booked
they should not have booked	I should not have been booking
you should not have been booking
he should not have been booking
we should not have been booking
you should not have been booking
they should not have been booking	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I book?
should you book?
should he book?
should we book?
should you book?
should they book? 	should I be booking?
should you be booking?
should he be booking?
should we be booking?
should you be booking?
should they be booking? 	should I have booked?
should you have booked?
should he have booked?
should we have booked?
should you have booked?
should they have booked? 	should I have been booking?
should you have been booking?
should he have been booking?
should we have been booking?
should you have been booking?
should they have been booking? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I not book?
should you not book?
should he not book?
should we not book?
should you not book?
should they not book? 	should I not be booking?
should you not be booking?
should he not be booking?
should we not be booking?
should you not be booking?
should they not be booking? 	should I not have booked?
should you not have booked?
should he not have booked?
should we not have booked?
should you not have booked?
should they not have booked? 	should I not have been booking?
should you not have been booking?
should he not have been booking?
should we not have been booking?
should you not have been booking?
should they not have been booking?