must thirst
Verbo regular: thirst - thirsted- thirsted

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

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't thirst
you mustn't thirst
he mustn't thirst
we mustn't thirst
you mustn't thirst
they mustn't thirst 	I mustn't be thirsting
you mustn't be thirsting
he mustn't be thirsting
we mustn't be thirsting
you mustn't be thirsting
they mustn't be thirsting	I mustn't have thirsted
you mustn't have thirsted
he mustn't have thirsted
we mustn't have thirsted
you mustn't have thirsted
they mustn't have thirsted	I mustn't have been thirsting
you mustn't have been thirsting
he mustn't have been thirsting
we mustn't have been thirsting
you mustn't have been thirsting
they mustn't have been thirsting	

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

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I thirst?
mustn't you thirst?
mustn't he thirst?
mustn't we thirst?
mustn't you thirst?
mustn't they thirst? 	mustn't I be thirsting?
mustn't you be thirsting?
mustn't he be thirsting?
mustn't we be thirsting?
mustn't you be thirsting?
mustn't they be thirsting? 	mustn't I have thirsted?
mustn't you have thirsted?
mustn't he have thirsted?
mustn't we have thirsted?
mustn't you have thirsted?
mustn't they have thirsted? 	mustn't I have been thirsting?
mustn't you have been thirsting?
mustn't he have been thirsting?
mustn't we have been thirsting?
mustn't you have been thirsting?
mustn't they have been thirsting?