English verb conjugation
COULD DOUBLE-BOOK

Regular verb: double-book - double-booked - double-booked

Affirmation

Simple form	V-ing form
I could double-book you could double-book she could double-book we could double-book you could double-book they could double-book	I could be double-booking you could be double-booking she could be double-booking we could be double-booking you could be double-booking they could be double-booking
Perfect	V-ing perfect
I could have double-booked you could have double-booked she could have double-booked we could have double-booked you could have double-booked they could have double-booked	I could have been double-booking you could have been double-booking she could have been double-booking we could have been double-booking you could have been double-booking they could have been double-booking

Negation

Simple form	V-ing form
I could not double-book you could not double-book she could not double-book we could not double-book you could not double-book they could not double-book	I could not be double-booking you could not be double-booking she could not be double-booking we could not be double-booking you could not be double-booking they could not be double-booking
Perfect	V-ing perfect
I could not have double-booked you could not have double-booked she could not have double-booked we could not have double-booked you could not have double-booked they could not have double-booked	I could not have been double-booking you could not have been double-booking she could not have been double-booking we could not have been double-booking you could not have been double-booking they could not have been double-booking

Interrogative form

Simple form	V-ing form
could I double-book? could you double-book? could she double-book? could we double-book? could you double-book? could they double-book?	could I be double-booking? could you be double-booking? could she be double-booking? could we be double-booking? could you be double-booking? could they be double-booking?
Perfect	V-ing perfect
could I have double-booked? could you have double-booked? could she have double-booked? could we have double-booked? could you have double-booked? could they have double-booked?	could I have been double-booking? could you have been double-booking? could she have been double-booking? could we have been double-booking? could you have been double-booking? could they have been double-booking?

Interro-negative form

Simple form	V-ing form
could I not double-book? could you not double-book? could she not double-book? could we not double-book? could you not double-book? could they not double-book?	could I not be double-booking? could you not be double-booking? could she not be double-booking? could we not be double-booking? could you not be double-booking? could they not be double-booking?
Perfect	V-ing perfect
could I not have double-booked? could you not have double-booked? could she not have double-booked? could we not have double-booked? could you not have double-booked? could they not have double-booked?	could I not have been double-booking? could you not have been double-booking? could she not have been double-booking? could we not have been double-booking? could you not have been double-booking? could they not have been double-booking?