English verb conjugation
CAN TITTER

Regular verb: titter - tittered - tittered

Affirmation

Simple form	V-ing form
I can titter you can titter he can titter we can titter you can titter they can titter	I can be tittering you can be tittering he can be tittering we can be tittering you can be tittering they can be tittering
Perfect	V-ing perfect
I can have tittered you can have tittered he can have tittered we can have tittered you can have tittered they can have tittered	I can have been tittering you can have been tittering he can have been tittering we can have been tittering you can have been tittering they can have been tittering

Negation

Simple form	V-ing form
I can't titter you can't titter he can't titter we can't titter you can't titter they can't titter	I can't be tittering you can't be tittering he can't be tittering we can't be tittering you can't be tittering they can't be tittering
Perfect	V-ing perfect
I can't have tittered you can't have tittered he can't have tittered we can't have tittered you can't have tittered they can't have tittered	I can't have been tittering you can't have been tittering he can't have been tittering we can't have been tittering you can't have been tittering they can't have been tittering

Interrogative form

Simple form	V-ing form
can I titter? can you titter? can he titter? can we titter? can you titter? can they titter?	can I be tittering? can you be tittering? can he be tittering? can we be tittering? can you be tittering? can they be tittering?
Perfect	V-ing perfect
can I have tittered? can you have tittered? can he have tittered? can we have tittered? can you have tittered? can they have tittered?	can I have been tittering? can you have been tittering? can he have been tittering? can we have been tittering? can you have been tittering? can they have been tittering?

Interro-negative form

Simple form	V-ing form
can't I titter? can't you titter? can't he titter? can't we titter? can't you titter? can't they titter?	can't I be tittering? can't you be tittering? can't he be tittering? can't we be tittering? can't you be tittering? can't they be tittering?
Perfect	V-ing perfect
can't I have tittered? can't you have tittered? can't he have tittered? can't we have tittered? can't you have tittered? can't they have tittered?	can't I have been tittering? can't you have been tittering? can't he have been tittering? can't we have been tittering? can't you have been tittering? can't they have been tittering?