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 must not lose
you must not lose
he must not lose
we must not lose
you must not lose
they must not lose 	I must not be losing
you must not be losing
he must not be losing
we must not be losing
you must not be losing
they must not be losing	I must not have lost
you must not have lost
he must not have lost
we must not have lost
you must not have lost
they must not have lost	I must not have been losing
you must not have been losing
he must not have been losing
we must not have been losing
you must not have been losing
they must not 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 	
must I not lose?
must you not lose?
must he not lose?
must we not lose?
must you not lose?
must they not lose? 	must I not be losing?
must you not be losing?
must he not be losing?
must we not be losing?
must you not be losing?
must they not be losing? 	must I not have lost?
must you not have lost?
must he not have lost?
must we not have lost?
must you not have lost?
must they not have lost? 	must I not have been losing?
must you not have been losing?
must he not have been losing?
must we not have been losing?
must you not have been losing?
must they not have been losing?