must retract
Verbo regular: retract - retracted- retracted

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must retract
you must retract
she must retract
we must retract
you must retract
they must retract 	I must be retracting
you must be retracting
she must be retracting
we must be retracting
you must be retracting
they must be retracting	I must have retracted
you must have retracted
she must have retracted
we must have retracted
you must have retracted
they must have retracted	I must have been retracting
you must have been retracting
she must have been retracting
we must have been retracting
you must have been retracting
they must have been retracting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not retract
you must not retract
she must not retract
we must not retract
you must not retract
they must not retract 	I must not be retracting
you must not be retracting
she must not be retracting
we must not be retracting
you must not be retracting
they must not be retracting	I must not have retracted
you must not have retracted
she must not have retracted
we must not have retracted
you must not have retracted
they must not have retracted	I must not have been retracting
you must not have been retracting
she must not have been retracting
we must not have been retracting
you must not have been retracting
they must not have been retracting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I retract?
must you retract?
must she retract?
must we retract?
must you retract?
must they retract? 	must I be retracting?
must you be retracting?
must she be retracting?
must we be retracting?
must you be retracting?
must they be retracting? 	must I have retracted?
must you have retracted?
must she have retracted?
must we have retracted?
must you have retracted?
must they have retracted? 	must I have been retracting?
must you have been retracting?
must she have been retracting?
must we have been retracting?
must you have been retracting?
must they have been retracting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not retract?
must you not retract?
must she not retract?
must we not retract?
must you not retract?
must they not retract? 	must I not be retracting?
must you not be retracting?
must she not be retracting?
must we not be retracting?
must you not be retracting?
must they not be retracting? 	must I not have retracted?
must you not have retracted?
must she not have retracted?
must we not have retracted?
must you not have retracted?
must they not have retracted? 	must I not have been retracting?
must you not have been retracting?
must she not have been retracting?
must we not have been retracting?
must you not have been retracting?
must they not have been retracting?