should book
Verbo regular: book - booked- booked

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I should book
you should book
she should book
we should book
you should book
they should book 	I should be booking
you should be booking
she should be booking
we should be booking
you should be booking
they should be booking	I should have booked
you should have booked
she 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
she should have been booking
we should have been booking
you should have been booking
they should have been booking	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I should not book
you should not book
she 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
she 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
she 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
she 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 com V-ing 	Perfeito 	Perfeito com V-ing 	
should I book?
should you book?
should she book?
should we book?
should you book?
should they book? 	should I be booking?
should you be booking?
should she be booking?
should we be booking?
should you be booking?
should they be booking? 	should I have booked?
should you have booked?
should she 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 she have been booking?
should we have been booking?
should you have been booking?
should they have been booking? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I not book?
should you not book?
should she 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 she 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 she 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 she not have been booking?
should we not have been booking?
should you not have been booking?
should they not have been booking?