must fever
Regular verb: fever - fevered- fevered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must fever
you must fever
she must fever
we must fever
you must fever
they must fever 	I must be fevering
you must be fevering
she must be fevering
we must be fevering
you must be fevering
they must be fevering	I must have fevered
you must have fevered
she must have fevered
we must have fevered
you must have fevered
they must have fevered	I must have been fevering
you must have been fevering
she must have been fevering
we must have been fevering
you must have been fevering
they must have been fevering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't fever
you mustn't fever
she mustn't fever
we mustn't fever
you mustn't fever
they mustn't fever 	I mustn't be fevering
you mustn't be fevering
she mustn't be fevering
we mustn't be fevering
you mustn't be fevering
they mustn't be fevering	I mustn't have fevered
you mustn't have fevered
she mustn't have fevered
we mustn't have fevered
you mustn't have fevered
they mustn't have fevered	I mustn't have been fevering
you mustn't have been fevering
she mustn't have been fevering
we mustn't have been fevering
you mustn't have been fevering
they mustn't have been fevering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I fever?
must you fever?
must she fever?
must we fever?
must you fever?
must they fever? 	must I be fevering?
must you be fevering?
must she be fevering?
must we be fevering?
must you be fevering?
must they be fevering? 	must I have fevered?
must you have fevered?
must she have fevered?
must we have fevered?
must you have fevered?
must they have fevered? 	must I have been fevering?
must you have been fevering?
must she have been fevering?
must we have been fevering?
must you have been fevering?
must they have been fevering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I fever?
mustn't you fever?
mustn't she fever?
mustn't we fever?
mustn't you fever?
mustn't they fever? 	mustn't I be fevering?
mustn't you be fevering?
mustn't she be fevering?
mustn't we be fevering?
mustn't you be fevering?
mustn't they be fevering? 	mustn't I have fevered?
mustn't you have fevered?
mustn't she have fevered?
mustn't we have fevered?
mustn't you have fevered?
mustn't they have fevered? 	mustn't I have been fevering?
mustn't you have been fevering?
mustn't she have been fevering?
mustn't we have been fevering?
mustn't you have been fevering?
mustn't they have been fevering?