must sleep
Verbo irregular: sleep - slept- slept

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must sleep
you must sleep
she must sleep
we must sleep
you must sleep
they must sleep 	I must be sleeping
you must be sleeping
she must be sleeping
we must be sleeping
you must be sleeping
they must be sleeping	I must have slept
you must have slept
she must have slept
we must have slept
you must have slept
they must have slept	I must have been sleeping
you must have been sleeping
she must have been sleeping
we must have been sleeping
you must have been sleeping
they must have been sleeping	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not sleep
you must not sleep
she must not sleep
we must not sleep
you must not sleep
they must not sleep 	I must not be sleeping
you must not be sleeping
she must not be sleeping
we must not be sleeping
you must not be sleeping
they must not be sleeping	I must not have slept
you must not have slept
she must not have slept
we must not have slept
you must not have slept
they must not have slept	I must not have been sleeping
you must not have been sleeping
she must not have been sleeping
we must not have been sleeping
you must not have been sleeping
they must not have been sleeping	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I sleep?
must you sleep?
must she sleep?
must we sleep?
must you sleep?
must they sleep? 	must I be sleeping?
must you be sleeping?
must she be sleeping?
must we be sleeping?
must you be sleeping?
must they be sleeping? 	must I have slept?
must you have slept?
must she have slept?
must we have slept?
must you have slept?
must they have slept? 	must I have been sleeping?
must you have been sleeping?
must she have been sleeping?
must we have been sleeping?
must you have been sleeping?
must they have been sleeping? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not sleep?
must you not sleep?
must she not sleep?
must we not sleep?
must you not sleep?
must they not sleep? 	must I not be sleeping?
must you not be sleeping?
must she not be sleeping?
must we not be sleeping?
must you not be sleeping?
must they not be sleeping? 	must I not have slept?
must you not have slept?
must she not have slept?
must we not have slept?
must you not have slept?
must they not have slept? 	must I not have been sleeping?
must you not have been sleeping?
must she not have been sleeping?
must we not have been sleeping?
must you not have been sleeping?
must they not have been sleeping?