can tittup
Regular verb: tittup - tittuped- tittuped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
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? 	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?