English verb conjugation
COULD TITTUP

Regular verb: tittup - tittuped - tittuped

Affirmation

Simple form	V-ing form
I could tittup you could tittup he could tittup we could tittup you could tittup they could tittup	I could be tittuping you could be tittuping he could be tittuping we could be tittuping you could be tittuping they could be tittuping
Perfect	V-ing perfect
I could have tittuped you could have tittuped he could have tittuped we could have tittuped you could have tittuped they could have tittuped	I could have been tittuping you could have been tittuping he could have been tittuping we could have been tittuping you could have been tittuping they could have been tittuping

Negation

Simple form	V-ing form
I could not tittup you could not tittup he could not tittup we could not tittup you could not tittup they could not tittup	I could not be tittuping you could not be tittuping he could not be tittuping we could not be tittuping you could not be tittuping they could not be tittuping
Perfect	V-ing perfect
I could not have tittuped you could not have tittuped he could not have tittuped we could not have tittuped you could not have tittuped they could not have tittuped	I could not have been tittuping you could not have been tittuping he could not have been tittuping we could not have been tittuping you could not have been tittuping they could not have been tittuping

Interrogative form

Simple form	V-ing form
could I tittup? could you tittup? could he tittup? could we tittup? could you tittup? could they tittup?	could I be tittuping? could you be tittuping? could he be tittuping? could we be tittuping? could you be tittuping? could they be tittuping?
Perfect	V-ing perfect
could I have tittuped? could you have tittuped? could he have tittuped? could we have tittuped? could you have tittuped? could they have tittuped?	could I have been tittuping? could you have been tittuping? could he have been tittuping? could we have been tittuping? could you have been tittuping? could they have been tittuping?

Interro-negative form

Simple form	V-ing form
could I not tittup? could you not tittup? could he not tittup? could we not tittup? could you not tittup? could they not tittup?	could I not be tittuping? could you not be tittuping? could he not be tittuping? could we not be tittuping? could you not be tittuping? could they not be tittuping?
Perfect	V-ing perfect
could I not have tittuped? could you not have tittuped? could he not have tittuped? could we not have tittuped? could you not have tittuped? could they not have tittuped?	could I not have been tittuping? could you not have been tittuping? could he not have been tittuping? could we not have been tittuping? could you not have been tittuping? could they not have been tittuping?