ought to book
Regular verb: book - booked- booked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to book
you ought to book
she ought to book
we ought to book
you ought to book
they ought to book 	I ought to be booking
you ought to be booking
she ought to be booking
we ought to be booking
you ought to be booking
they ought to be booking	I ought to have booked
you ought to have booked
she ought to have booked
we ought to have booked
you ought to have booked
they ought to have booked	I ought to have been booking
you ought to have been booking
she ought to have been booking
we ought to have been booking
you ought to have been booking
they ought to have been booking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to book
you oughtn't to book
she oughtn't to book
we oughtn't to book
you oughtn't to book
they oughtn't to book 	I oughtn't to be booking
you oughtn't to be booking
she oughtn't to be booking
we oughtn't to be booking
you oughtn't to be booking
they oughtn't to be booking	I oughtn't to have booked
you oughtn't to have booked
she oughtn't to have booked
we oughtn't to have booked
you oughtn't to have booked
they oughtn't to have booked	I oughtn't to have been booking
you oughtn't to have been booking
she oughtn't to have been booking
we oughtn't to have been booking
you oughtn't to have been booking
they oughtn't to have been booking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I book?
ought to you book?
ought to she book?
ought to we book?
ought to you book?
ought to they book? 	ought to I be booking?
ought to you be booking?
ought to she be booking?
ought to we be booking?
ought to you be booking?
ought to they be booking? 	ought to I have booked?
ought to you have booked?
ought to she have booked?
ought to we have booked?
ought to you have booked?
ought to they have booked? 	ought to I have been booking?
ought to you have been booking?
ought to she have been booking?
ought to we have been booking?
ought to you have been booking?
ought to they have been booking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to book?
oughtn't you to book?
oughtn't she to book?
oughtn't we to book?
oughtn't you to book?
oughtn't they to book? 	oughtn't I to be booking?
oughtn't you to be booking?
oughtn't she to be booking?
oughtn't we to be booking?
oughtn't you to be booking?
oughtn't they to be booking? 	oughtn't I to have booked?
oughtn't you to have booked?
oughtn't she to have booked?
oughtn't we to have booked?
oughtn't you to have booked?
oughtn't they to have booked? 	oughtn't I to have been booking?
oughtn't you to have been booking?
oughtn't she to have been booking?
oughtn't we to have been booking?
oughtn't you to have been booking?
oughtn't they to have been booking?