must persevere persevere
Regular verb: persevere persevere - persevere persevered- persevere persevered

, this verb may not exist. Conjugation is given as example.

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must persevere persevere
you must persevere persevere
she must persevere persevere
we must persevere persevere
you must persevere persevere
they must persevere persevere 	I must be persevere persevering
you must be persevere persevering
she must be persevere persevering
we must be persevere persevering
you must be persevere persevering
they must be persevere persevering	I must have persevere persevered
you must have persevere persevered
she must have persevere persevered
we must have persevere persevered
you must have persevere persevered
they must have persevere persevered	I must have been persevere persevering
you must have been persevere persevering
she must have been persevere persevering
we must have been persevere persevering
you must have been persevere persevering
they must have been persevere persevering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not persevere persevere
you must not persevere persevere
she must not persevere persevere
we must not persevere persevere
you must not persevere persevere
they must not persevere persevere 	I must not be persevere persevering
you must not be persevere persevering
she must not be persevere persevering
we must not be persevere persevering
you must not be persevere persevering
they must not be persevere persevering	I must not have persevere persevered
you must not have persevere persevered
she must not have persevere persevered
we must not have persevere persevered
you must not have persevere persevered
they must not have persevere persevered	I must not have been persevere persevering
you must not have been persevere persevering
she must not have been persevere persevering
we must not have been persevere persevering
you must not have been persevere persevering
they must not have been persevere persevering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I persevere persevere?
must you persevere persevere?
must she persevere persevere?
must we persevere persevere?
must you persevere persevere?
must they persevere persevere? 	must I be persevere persevering?
must you be persevere persevering?
must she be persevere persevering?
must we be persevere persevering?
must you be persevere persevering?
must they be persevere persevering? 	must I have persevere persevered?
must you have persevere persevered?
must she have persevere persevered?
must we have persevere persevered?
must you have persevere persevered?
must they have persevere persevered? 	must I have been persevere persevering?
must you have been persevere persevering?
must she have been persevere persevering?
must we have been persevere persevering?
must you have been persevere persevering?
must they have been persevere persevering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not persevere persevere?
must you not persevere persevere?
must she not persevere persevere?
must we not persevere persevere?
must you not persevere persevere?
must they not persevere persevere? 	must I not be persevere persevering?
must you not be persevere persevering?
must she not be persevere persevering?
must we not be persevere persevering?
must you not be persevere persevering?
must they not be persevere persevering? 	must I not have persevere persevered?
must you not have persevere persevered?
must she not have persevere persevered?
must we not have persevere persevered?
must you not have persevere persevered?
must they not have persevere persevered? 	must I not have been persevere persevering?
must you not have been persevere persevering?
must she not have been persevere persevering?
must we not have been persevere persevering?
must you not have been persevere persevering?
must they not have been persevere persevering?