must lose
Verbo irregular: lose - lost- lost

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must lose
you must lose
he must lose
we must lose
you must lose
they must lose 	I must be losing
you must be losing
he must be losing
we must be losing
you must be losing
they must be losing	I must have lost
you must have lost
he must have lost
we must have lost
you must have lost
they must have lost	I must have been losing
you must have been losing
he must have been losing
we must have been losing
you must have been losing
they must have been losing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't lose
you mustn't lose
he mustn't lose
we mustn't lose
you mustn't lose
they mustn't lose 	I mustn't be losing
you mustn't be losing
he mustn't be losing
we mustn't be losing
you mustn't be losing
they mustn't be losing	I mustn't have lost
you mustn't have lost
he mustn't have lost
we mustn't have lost
you mustn't have lost
they mustn't have lost	I mustn't have been losing
you mustn't have been losing
he mustn't have been losing
we mustn't have been losing
you mustn't have been losing
they mustn't have been losing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I lose?
must you lose?
must he lose?
must we lose?
must you lose?
must they lose? 	must I be losing?
must you be losing?
must he be losing?
must we be losing?
must you be losing?
must they be losing? 	must I have lost?
must you have lost?
must he have lost?
must we have lost?
must you have lost?
must they have lost? 	must I have been losing?
must you have been losing?
must he have been losing?
must we have been losing?
must you have been losing?
must they have been losing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I lose?
mustn't you lose?
mustn't he lose?
mustn't we lose?
mustn't you lose?
mustn't they lose? 	mustn't I be losing?
mustn't you be losing?
mustn't he be losing?
mustn't we be losing?
mustn't you be losing?
mustn't they be losing? 	mustn't I have lost?
mustn't you have lost?
mustn't he have lost?
mustn't we have lost?
mustn't you have lost?
mustn't they have lost? 	mustn't I have been losing?
mustn't you have been losing?
mustn't he have been losing?
mustn't we have been losing?
mustn't you have been losing?
mustn't they have been losing?