may book
Regular verb: book - booked- booked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may book
you may book
he may book
we may book
you may book
they may book 	I may be booking
you may be booking
he may be booking
we may be booking
you may be booking
they may be booking	I may have booked
you may have booked
he may have booked
we may have booked
you may have booked
they may have booked	I may have been booking
you may have been booking
he may have been booking
we may have been booking
you may have been booking
they may have been booking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may not book
you may not book
he may not book
we may not book
you may not book
they may not book 	I may not be booking
you may not be booking
he may not be booking
we may not be booking
you may not be booking
they may not be booking	I may not have booked
you may not have booked
he may not have booked
we may not have booked
you may not have booked
they may not have booked	I may not have been booking
you may not have been booking
he may not have been booking
we may not have been booking
you may not have been booking
they may not have been booking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I book?
may you book?
may he book?
may we book?
may you book?
may they book? 	may I be booking?
may you be booking?
may he be booking?
may we be booking?
may you be booking?
may they be booking? 	may I have booked?
may you have booked?
may he have booked?
may we have booked?
may you have booked?
may they have booked? 	may I have been booking?
may you have been booking?
may he have been booking?
may we have been booking?
may you have been booking?
may they have been booking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I not book?
may you not book?
may he not book?
may we not book?
may you not book?
may they not book? 	may I not be booking?
may you not be booking?
may he not be booking?
may we not be booking?
may you not be booking?
may they not be booking? 	may I not have booked?
may you not have booked?
may he not have booked?
may we not have booked?
may you not have booked?
may they not have booked? 	may I not have been booking?
may you not have been booking?
may he not have been booking?
may we not have been booking?
may you not have been booking?
may they not have been booking?