must shear
Irregular verb: shear - sheared- sheared, shorn

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must shear
you must shear
he must shear
we must shear
you must shear
they must shear 	I must be shearing
you must be shearing
he must be shearing
we must be shearing
you must be shearing
they must be shearing	I must have sheared, shorn
you must have sheared, shorn
he must have sheared, shorn
we must have sheared, shorn
you must have sheared, shorn
they must have sheared, shorn	I must have been shearing
you must have been shearing
he must have been shearing
we must have been shearing
you must have been shearing
they must have been shearing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't shear
you mustn't shear
he mustn't shear
we mustn't shear
you mustn't shear
they mustn't shear 	I mustn't be shearing
you mustn't be shearing
he mustn't be shearing
we mustn't be shearing
you mustn't be shearing
they mustn't be shearing	I mustn't have sheared, shorn
you mustn't have sheared, shorn
he mustn't have sheared, shorn
we mustn't have sheared, shorn
you mustn't have sheared, shorn
they mustn't have sheared, shorn	I mustn't have been shearing
you mustn't have been shearing
he mustn't have been shearing
we mustn't have been shearing
you mustn't have been shearing
they mustn't have been shearing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I shear?
must you shear?
must he shear?
must we shear?
must you shear?
must they shear? 	must I be shearing?
must you be shearing?
must he be shearing?
must we be shearing?
must you be shearing?
must they be shearing? 	must I have sheared, shorn?
must you have sheared, shorn?
must he have sheared, shorn?
must we have sheared, shorn?
must you have sheared, shorn?
must they have sheared, shorn? 	must I have been shearing?
must you have been shearing?
must he have been shearing?
must we have been shearing?
must you have been shearing?
must they have been shearing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I shear?
mustn't you shear?
mustn't he shear?
mustn't we shear?
mustn't you shear?
mustn't they shear? 	mustn't I be shearing?
mustn't you be shearing?
mustn't he be shearing?
mustn't we be shearing?
mustn't you be shearing?
mustn't they be shearing? 	mustn't I have sheared, shorn?
mustn't you have sheared, shorn?
mustn't he have sheared, shorn?
mustn't we have sheared, shorn?
mustn't you have sheared, shorn?
mustn't they have sheared, shorn? 	mustn't I have been shearing?
mustn't you have been shearing?
mustn't he have been shearing?
mustn't we have been shearing?
mustn't you have been shearing?
mustn't they have been shearing?