must sheer
Regular verb: sheer - sheered- sheered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must sheer
you must sheer
she must sheer
we must sheer
you must sheer
they must sheer 	I must be sheering
you must be sheering
she must be sheering
we must be sheering
you must be sheering
they must be sheering	I must have sheered
you must have sheered
she must have sheered
we must have sheered
you must have sheered
they must have sheered	I must have been sheering
you must have been sheering
she must have been sheering
we must have been sheering
you must have been sheering
they must have been sheering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not sheer
you must not sheer
she must not sheer
we must not sheer
you must not sheer
they must not sheer 	I must not be sheering
you must not be sheering
she must not be sheering
we must not be sheering
you must not be sheering
they must not be sheering	I must not have sheered
you must not have sheered
she must not have sheered
we must not have sheered
you must not have sheered
they must not have sheered	I must not have been sheering
you must not have been sheering
she must not have been sheering
we must not have been sheering
you must not have been sheering
they must not have been sheering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I sheer?
must you sheer?
must she sheer?
must we sheer?
must you sheer?
must they sheer? 	must I be sheering?
must you be sheering?
must she be sheering?
must we be sheering?
must you be sheering?
must they be sheering? 	must I have sheered?
must you have sheered?
must she have sheered?
must we have sheered?
must you have sheered?
must they have sheered? 	must I have been sheering?
must you have been sheering?
must she have been sheering?
must we have been sheering?
must you have been sheering?
must they have been sheering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not sheer?
must you not sheer?
must she not sheer?
must we not sheer?
must you not sheer?
must they not sheer? 	must I not be sheering?
must you not be sheering?
must she not be sheering?
must we not be sheering?
must you not be sheering?
must they not be sheering? 	must I not have sheered?
must you not have sheered?
must she not have sheered?
must we not have sheered?
must you not have sheered?
must they not have sheered? 	must I not have been sheering?
must you not have been sheering?
must she not have been sheering?
must we not have been sheering?
must you not have been sheering?
must they not have been sheering?