should titter
Verbo regular: titter - tittered- tittered

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I'd titter
you'd titter
he'd titter
we'd titter
you'd titter
they'd titter 	I'd be tittering
you'd be tittering
he'd be tittering
we'd be tittering
you'd be tittering
they'd be tittering	I should've tittered
you should've tittered
he should've tittered
we should've tittered
you should've tittered
they should've tittered	I should've been tittering
you should've been tittering
he should've been tittering
we should've been tittering
you should've been tittering
they should've been tittering	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I shouldn't titter
you shouldn't titter
he shouldn't titter
we shouldn't titter
you shouldn't titter
they shouldn't titter 	I shouldn't be tittering
you shouldn't be tittering
he shouldn't be tittering
we shouldn't be tittering
you shouldn't be tittering
they shouldn't be tittering	I shouldn't have tittered
you shouldn't have tittered
he shouldn't have tittered
we shouldn't have tittered
you shouldn't have tittered
they shouldn't have tittered	I shouldn't have been tittering
you shouldn't have been tittering
he shouldn't have been tittering
we shouldn't have been tittering
you shouldn't have been tittering
they shouldn't have been tittering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I titter?
should you titter?
should he titter?
should we titter?
should you titter?
should they titter? 	should I be tittering?
should you be tittering?
should he be tittering?
should we be tittering?
should you be tittering?
should they be tittering? 	should I have tittered?
should you have tittered?
should he have tittered?
should we have tittered?
should you have tittered?
should they have tittered? 	should I have been tittering?
should you have been tittering?
should he have been tittering?
should we have been tittering?
should you have been tittering?
should they have been tittering? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
shouldn't I titter?
shouldn't you titter?
shouldn't he titter?
shouldn't we titter?
shouldn't you titter?
shouldn't they titter? 	shouldn't I be tittering?
shouldn't you be tittering?
shouldn't he be tittering?
shouldn't we be tittering?
shouldn't you be tittering?
shouldn't they be tittering? 	shouldn't I have tittered?
shouldn't you have tittered?
shouldn't he have tittered?
shouldn't we have tittered?
shouldn't you have tittered?
shouldn't they have tittered? 	shouldn't I have been tittering?
shouldn't you have been tittering?
shouldn't he have been tittering?
shouldn't we have been tittering?
shouldn't you have been tittering?
shouldn't they have been tittering?