could thirst
Verbo regular: thirst - thirsted- thirsted

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could thirst
you could thirst
she could thirst
we could thirst
you could thirst
they could thirst 	I could be thirsting
you could be thirsting
she could be thirsting
we could be thirsting
you could be thirsting
they could be thirsting	I could have thirsted
you could have thirsted
she could have thirsted
we could have thirsted
you could have thirsted
they could have thirsted	I could have been thirsting
you could have been thirsting
she could have been thirsting
we could have been thirsting
you could have been thirsting
they could have been thirsting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not thirst
you could not thirst
she could not thirst
we could not thirst
you could not thirst
they could not thirst 	I could not be thirsting
you could not be thirsting
she could not be thirsting
we could not be thirsting
you could not be thirsting
they could not be thirsting	I could not have thirsted
you could not have thirsted
she could not have thirsted
we could not have thirsted
you could not have thirsted
they could not have thirsted	I could not have been thirsting
you could not have been thirsting
she could not have been thirsting
we could not have been thirsting
you could not have been thirsting
they could not have been thirsting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I thirst?
could you thirst?
could she thirst?
could we thirst?
could you thirst?
could they thirst? 	could I be thirsting?
could you be thirsting?
could she be thirsting?
could we be thirsting?
could you be thirsting?
could they be thirsting? 	could I have thirsted?
could you have thirsted?
could she have thirsted?
could we have thirsted?
could you have thirsted?
could they have thirsted? 	could I have been thirsting?
could you have been thirsting?
could she have been thirsting?
could we have been thirsting?
could you have been thirsting?
could they have been thirsting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not thirst?
could you not thirst?
could she not thirst?
could we not thirst?
could you not thirst?
could they not thirst? 	could I not be thirsting?
could you not be thirsting?
could she not be thirsting?
could we not be thirsting?
could you not be thirsting?
could they not be thirsting? 	could I not have thirsted?
could you not have thirsted?
could she not have thirsted?
could we not have thirsted?
could you not have thirsted?
could they not have thirsted? 	could I not have been thirsting?
could you not have been thirsting?
could she not have been thirsting?
could we not have been thirsting?
could you not have been thirsting?
could they not have been thirsting?