can thirst
Regular verb: thirst - thirsted- thirsted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can thirst
you can thirst
he can thirst
we can thirst
you can thirst
they can thirst 	I can be thirsting
you can be thirsting
he can be thirsting
we can be thirsting
you can be thirsting
they can be thirsting	I can have thirsted
you can have thirsted
he can have thirsted
we can have thirsted
you can have thirsted
they can have thirsted	I can have been thirsting
you can have been thirsting
he can have been thirsting
we can have been thirsting
you can have been thirsting
they can have been thirsting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot thirst
you cannot thirst
he cannot thirst
we cannot thirst
you cannot thirst
they cannot thirst 	I cannot be thirsting
you cannot be thirsting
he cannot be thirsting
we cannot be thirsting
you cannot be thirsting
they cannot be thirsting	I cannot have thirsted
you cannot have thirsted
he cannot have thirsted
we cannot have thirsted
you cannot have thirsted
they cannot have thirsted	I cannot have been thirsting
you cannot have been thirsting
he cannot have been thirsting
we cannot have been thirsting
you cannot have been thirsting
they cannot have been thirsting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I thirst?
can you thirst?
can he thirst?
can we thirst?
can you thirst?
can they thirst? 	can I be thirsting?
can you be thirsting?
can he be thirsting?
can we be thirsting?
can you be thirsting?
can they be thirsting? 	can I have thirsted?
can you have thirsted?
can he have thirsted?
can we have thirsted?
can you have thirsted?
can they have thirsted? 	can I have been thirsting?
can you have been thirsting?
can he have been thirsting?
can we have been thirsting?
can you have been thirsting?
can they have been thirsting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not thirst?
can you not thirst?
can he not thirst?
can we not thirst?
can you not thirst?
can they not thirst? 	can I not be thirsting?
can you not be thirsting?
can he not be thirsting?
can we not be thirsting?
can you not be thirsting?
can they not be thirsting? 	can I not have thirsted?
can you not have thirsted?
can he not have thirsted?
can we not have thirsted?
can you not have thirsted?
can they not have thirsted? 	can I not have been thirsting?
can you not have been thirsting?
can he not have been thirsting?
can we not have been thirsting?
can you not have been thirsting?
can they not have been thirsting?