English verb conjugation
COULD OVERBOOK

Regular verb: overbook - overbooked - overbooked

Affirmation

Simple form	V-ing form
I could overbook you could overbook he could overbook we could overbook you could overbook they could overbook	I could be overbooking you could be overbooking he could be overbooking we could be overbooking you could be overbooking they could be overbooking
Perfect	V-ing perfect
I could have overbooked you could have overbooked he could have overbooked we could have overbooked you could have overbooked they could have overbooked	I could have been overbooking you could have been overbooking he could have been overbooking we could have been overbooking you could have been overbooking they could have been overbooking

Negation

Simple form	V-ing form
I couldn't overbook you couldn't overbook he couldn't overbook we couldn't overbook you couldn't overbook they couldn't overbook	I couldn't be overbooking you couldn't be overbooking he couldn't be overbooking we couldn't be overbooking you couldn't be overbooking they couldn't be overbooking
Perfect	V-ing perfect
I couldn't have overbooked you couldn't have overbooked he couldn't have overbooked we couldn't have overbooked you couldn't have overbooked they couldn't have overbooked	I couldn't have been overbooking you couldn't have been overbooking he couldn't have been overbooking we couldn't have been overbooking you couldn't have been overbooking they couldn't have been overbooking

Interrogative form

Simple form	V-ing form
could I overbook? could you overbook? could he overbook? could we overbook? could you overbook? could they overbook?	could I be overbooking? could you be overbooking? could he be overbooking? could we be overbooking? could you be overbooking? could they be overbooking?
Perfect	V-ing perfect
could I have overbooked? could you have overbooked? could he have overbooked? could we have overbooked? could you have overbooked? could they have overbooked?	could I have been overbooking? could you have been overbooking? could he have been overbooking? could we have been overbooking? could you have been overbooking? could they have been overbooking?

Interro-negative form

Simple form	V-ing form
couldn't I overbook? couldn't you overbook? couldn't he overbook? couldn't we overbook? couldn't you overbook? couldn't they overbook?	couldn't I be overbooking? couldn't you be overbooking? couldn't he be overbooking? couldn't we be overbooking? couldn't you be overbooking? couldn't they be overbooking?
Perfect	V-ing perfect
couldn't I have overbooked? couldn't you have overbooked? couldn't he have overbooked? couldn't we have overbooked? couldn't you have overbooked? couldn't they have overbooked?	couldn't I have been overbooking? couldn't you have been overbooking? couldn't he have been overbooking? couldn't we have been overbooking? couldn't you have been overbooking? couldn't they have been overbooking?