could pith
Verbo regular: pith - pithed- pithed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could pith
you could pith
he could pith
we could pith
you could pith
they could pith 	I could be pithing
you could be pithing
he could be pithing
we could be pithing
you could be pithing
they could be pithing	I could have pithed
you could have pithed
he could have pithed
we could have pithed
you could have pithed
they could have pithed	I could have been pithing
you could have been pithing
he could have been pithing
we could have been pithing
you could have been pithing
they could have been pithing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not pith
you could not pith
he could not pith
we could not pith
you could not pith
they could not pith 	I could not be pithing
you could not be pithing
he could not be pithing
we could not be pithing
you could not be pithing
they could not be pithing	I could not have pithed
you could not have pithed
he could not have pithed
we could not have pithed
you could not have pithed
they could not have pithed	I could not have been pithing
you could not have been pithing
he could not have been pithing
we could not have been pithing
you could not have been pithing
they could not have been pithing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I pith?
could you pith?
could he pith?
could we pith?
could you pith?
could they pith? 	could I be pithing?
could you be pithing?
could he be pithing?
could we be pithing?
could you be pithing?
could they be pithing? 	could I have pithed?
could you have pithed?
could he have pithed?
could we have pithed?
could you have pithed?
could they have pithed? 	could I have been pithing?
could you have been pithing?
could he have been pithing?
could we have been pithing?
could you have been pithing?
could they have been pithing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not pith?
could you not pith?
could he not pith?
could we not pith?
could you not pith?
could they not pith? 	could I not be pithing?
could you not be pithing?
could he not be pithing?
could we not be pithing?
could you not be pithing?
could they not be pithing? 	could I not have pithed?
could you not have pithed?
could he not have pithed?
could we not have pithed?
could you not have pithed?
could they not have pithed? 	could I not have been pithing?
could you not have been pithing?
could he not have been pithing?
could we not have been pithing?
could you not have been pithing?
could they not have been pithing?