must nicker
Regular verb: nicker - nickered- nickered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must nicker
you must nicker
he must nicker
we must nicker
you must nicker
they must nicker 	I must be nickering
you must be nickering
he must be nickering
we must be nickering
you must be nickering
they must be nickering	I must have nickered
you must have nickered
he must have nickered
we must have nickered
you must have nickered
they must have nickered	I must have been nickering
you must have been nickering
he must have been nickering
we must have been nickering
you must have been nickering
they must have been nickering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't nicker
you mustn't nicker
he mustn't nicker
we mustn't nicker
you mustn't nicker
they mustn't nicker 	I mustn't be nickering
you mustn't be nickering
he mustn't be nickering
we mustn't be nickering
you mustn't be nickering
they mustn't be nickering	I mustn't have nickered
you mustn't have nickered
he mustn't have nickered
we mustn't have nickered
you mustn't have nickered
they mustn't have nickered	I mustn't have been nickering
you mustn't have been nickering
he mustn't have been nickering
we mustn't have been nickering
you mustn't have been nickering
they mustn't have been nickering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I nicker?
must you nicker?
must he nicker?
must we nicker?
must you nicker?
must they nicker? 	must I be nickering?
must you be nickering?
must he be nickering?
must we be nickering?
must you be nickering?
must they be nickering? 	must I have nickered?
must you have nickered?
must he have nickered?
must we have nickered?
must you have nickered?
must they have nickered? 	must I have been nickering?
must you have been nickering?
must he have been nickering?
must we have been nickering?
must you have been nickering?
must they have been nickering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I nicker?
mustn't you nicker?
mustn't he nicker?
mustn't we nicker?
mustn't you nicker?
mustn't they nicker? 	mustn't I be nickering?
mustn't you be nickering?
mustn't he be nickering?
mustn't we be nickering?
mustn't you be nickering?
mustn't they be nickering? 	mustn't I have nickered?
mustn't you have nickered?
mustn't he have nickered?
mustn't we have nickered?
mustn't you have nickered?
mustn't they have nickered? 	mustn't I have been nickering?
mustn't you have been nickering?
mustn't he have been nickering?
mustn't we have been nickering?
mustn't you have been nickering?
mustn't they have been nickering?