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 he 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 he 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 he 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 he 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 couldn't double-book you couldn't double-book he couldn't double-book we couldn't double-book you couldn't double-book they couldn't double-book	I couldn't be double-booking you couldn't be double-booking he couldn't be double-booking we couldn't be double-booking you couldn't be double-booking they couldn't be double-booking
Perfect	V-ing perfect
I couldn't have double-booked you couldn't have double-booked he couldn't have double-booked we couldn't have double-booked you couldn't have double-booked they couldn't have double-booked	I couldn't have been double-booking you couldn't have been double-booking he couldn't have been double-booking we couldn't have been double-booking you couldn't have been double-booking they couldn't have been double-booking

Interrogative form

Simple form	V-ing form
could I double-book? could you double-book? could he 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 he 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 he 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 he 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
couldn't I double-book? couldn't you double-book? couldn't he double-book? couldn't we double-book? couldn't you double-book? couldn't they double-book?	couldn't I be double-booking? couldn't you be double-booking? couldn't he be double-booking? couldn't we be double-booking? couldn't you be double-booking? couldn't they be double-booking?
Perfect	V-ing perfect
couldn't I have double-booked? couldn't you have double-booked? couldn't he have double-booked? couldn't we have double-booked? couldn't you have double-booked? couldn't they have double-booked?	couldn't I have been double-booking? couldn't you have been double-booking? couldn't he have been double-booking? couldn't we have been double-booking? couldn't you have been double-booking? couldn't they have been double-booking?