must protract
Regular verb: protract - protracted- protracted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must protract
you must protract
she must protract
we must protract
you must protract
they must protract 	I must be protracting
you must be protracting
she must be protracting
we must be protracting
you must be protracting
they must be protracting	I must have protracted
you must have protracted
she must have protracted
we must have protracted
you must have protracted
they must have protracted	I must have been protracting
you must have been protracting
she must have been protracting
we must have been protracting
you must have been protracting
they must have been protracting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't protract
you mustn't protract
she mustn't protract
we mustn't protract
you mustn't protract
they mustn't protract 	I mustn't be protracting
you mustn't be protracting
she mustn't be protracting
we mustn't be protracting
you mustn't be protracting
they mustn't be protracting	I mustn't have protracted
you mustn't have protracted
she mustn't have protracted
we mustn't have protracted
you mustn't have protracted
they mustn't have protracted	I mustn't have been protracting
you mustn't have been protracting
she mustn't have been protracting
we mustn't have been protracting
you mustn't have been protracting
they mustn't have been protracting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I protract?
must you protract?
must she protract?
must we protract?
must you protract?
must they protract? 	must I be protracting?
must you be protracting?
must she be protracting?
must we be protracting?
must you be protracting?
must they be protracting? 	must I have protracted?
must you have protracted?
must she have protracted?
must we have protracted?
must you have protracted?
must they have protracted? 	must I have been protracting?
must you have been protracting?
must she have been protracting?
must we have been protracting?
must you have been protracting?
must they have been protracting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I protract?
mustn't you protract?
mustn't she protract?
mustn't we protract?
mustn't you protract?
mustn't they protract? 	mustn't I be protracting?
mustn't you be protracting?
mustn't she be protracting?
mustn't we be protracting?
mustn't you be protracting?
mustn't they be protracting? 	mustn't I have protracted?
mustn't you have protracted?
mustn't she have protracted?
mustn't we have protracted?
mustn't you have protracted?
mustn't they have protracted? 	mustn't I have been protracting?
mustn't you have been protracting?
mustn't she have been protracting?
mustn't we have been protracting?
mustn't you have been protracting?
mustn't they have been protracting?