English verb conjugation
CAN TITTUP

Regular verb: tittup - tittuped - tittuped

Affirmation

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

Negation

Simple form	V-ing form
I can't tittup you can't tittup he can't tittup we can't tittup you can't tittup they can't tittup	I can't be tittuping you can't be tittuping he can't be tittuping we can't be tittuping you can't be tittuping they can't be tittuping
Perfect	V-ing perfect
I can't have tittuped you can't have tittuped he can't have tittuped we can't have tittuped you can't have tittuped they can't have tittuped	I can't have been tittuping you can't have been tittuping he can't have been tittuping we can't have been tittuping you can't have been tittuping they can't have been tittuping

Interrogative form

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

Interro-negative form

Simple form	V-ing form
can't I tittup? can't you tittup? can't he tittup? can't we tittup? can't you tittup? can't they tittup?	can't I be tittuping? can't you be tittuping? can't he be tittuping? can't we be tittuping? can't you be tittuping? can't they be tittuping?
Perfect	V-ing perfect
can't I have tittuped? can't you have tittuped? can't he have tittuped? can't we have tittuped? can't you have tittuped? can't they have tittuped?	can't I have been tittuping? can't you have been tittuping? can't he have been tittuping? can't we have been tittuping? can't you have been tittuping? can't they have been tittuping?