must leer
Regular verb: leer - leered- leered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must leer
you must leer
he must leer
we must leer
you must leer
they must leer 	I must be leering
you must be leering
he must be leering
we must be leering
you must be leering
they must be leering	I must have leered
you must have leered
he must have leered
we must have leered
you must have leered
they must have leered	I must have been leering
you must have been leering
he must have been leering
we must have been leering
you must have been leering
they must have been leering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't leer
you mustn't leer
he mustn't leer
we mustn't leer
you mustn't leer
they mustn't leer 	I mustn't be leering
you mustn't be leering
he mustn't be leering
we mustn't be leering
you mustn't be leering
they mustn't be leering	I mustn't have leered
you mustn't have leered
he mustn't have leered
we mustn't have leered
you mustn't have leered
they mustn't have leered	I mustn't have been leering
you mustn't have been leering
he mustn't have been leering
we mustn't have been leering
you mustn't have been leering
they mustn't have been leering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I leer?
must you leer?
must he leer?
must we leer?
must you leer?
must they leer? 	must I be leering?
must you be leering?
must he be leering?
must we be leering?
must you be leering?
must they be leering? 	must I have leered?
must you have leered?
must he have leered?
must we have leered?
must you have leered?
must they have leered? 	must I have been leering?
must you have been leering?
must he have been leering?
must we have been leering?
must you have been leering?
must they have been leering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I leer?
mustn't you leer?
mustn't he leer?
mustn't we leer?
mustn't you leer?
mustn't they leer? 	mustn't I be leering?
mustn't you be leering?
mustn't he be leering?
mustn't we be leering?
mustn't you be leering?
mustn't they be leering? 	mustn't I have leered?
mustn't you have leered?
mustn't he have leered?
mustn't we have leered?
mustn't you have leered?
mustn't they have leered? 	mustn't I have been leering?
mustn't you have been leering?
mustn't he have been leering?
mustn't we have been leering?
mustn't you have been leering?
mustn't they have been leering?