English verb conjugation
COULD THIRST

Regular verb: thirst - thirsted - thirsted

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Negation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Interrogative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?

Interro-negative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?