could titter
Verbo regolare: titter - tittered- tittered

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could titter
you could titter
she could titter
we could titter
you could titter
they could titter 	I could be tittering
you could be tittering
she could be tittering
we could be tittering
you could be tittering
they could be tittering	I could have tittered
you could have tittered
she could have tittered
we could have tittered
you could have tittered
they could have tittered	I could have been tittering
you could have been tittering
she could have been tittering
we could have been tittering
you could have been tittering
they could have been tittering	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could not titter
you could not titter
she could not titter
we could not titter
you could not titter
they could not titter 	I could not be tittering
you could not be tittering
she could not be tittering
we could not be tittering
you could not be tittering
they could not be tittering	I could not have tittered
you could not have tittered
she could not have tittered
we could not have tittered
you could not have tittered
they could not have tittered	I could not have been tittering
you could not have been tittering
she could not have been tittering
we could not have been tittering
you could not have been tittering
they could not have been tittering	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I titter?
could you titter?
could she titter?
could we titter?
could you titter?
could they titter? 	could I be tittering?
could you be tittering?
could she be tittering?
could we be tittering?
could you be tittering?
could they be tittering? 	could I have tittered?
could you have tittered?
could she have tittered?
could we have tittered?
could you have tittered?
could they have tittered? 	could I have been tittering?
could you have been tittering?
could she have been tittering?
could we have been tittering?
could you have been tittering?
could they have been tittering? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I not titter?
could you not titter?
could she not titter?
could we not titter?
could you not titter?
could they not titter? 	could I not be tittering?
could you not be tittering?
could she not be tittering?
could we not be tittering?
could you not be tittering?
could they not be tittering? 	could I not have tittered?
could you not have tittered?
could she not have tittered?
could we not have tittered?
could you not have tittered?
could they not have tittered? 	could I not have been tittering?
could you not have been tittering?
could she not have been tittering?
could we not have been tittering?
could you not have been tittering?
could they not have been tittering?