must persevere
Regular verb: persevere - persevered- persevered

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

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

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

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