must shoulder
Regular verb: shoulder - shouldered- shouldered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must shoulder
you must shoulder
she must shoulder
we must shoulder
you must shoulder
they must shoulder 	I must be shouldering
you must be shouldering
she must be shouldering
we must be shouldering
you must be shouldering
they must be shouldering	I must have shouldered
you must have shouldered
she must have shouldered
we must have shouldered
you must have shouldered
they must have shouldered	I must have been shouldering
you must have been shouldering
she must have been shouldering
we must have been shouldering
you must have been shouldering
they must have been shouldering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't shoulder
you mustn't shoulder
she mustn't shoulder
we mustn't shoulder
you mustn't shoulder
they mustn't shoulder 	I mustn't be shouldering
you mustn't be shouldering
she mustn't be shouldering
we mustn't be shouldering
you mustn't be shouldering
they mustn't be shouldering	I mustn't have shouldered
you mustn't have shouldered
she mustn't have shouldered
we mustn't have shouldered
you mustn't have shouldered
they mustn't have shouldered	I mustn't have been shouldering
you mustn't have been shouldering
she mustn't have been shouldering
we mustn't have been shouldering
you mustn't have been shouldering
they mustn't have been shouldering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I shoulder?
must you shoulder?
must she shoulder?
must we shoulder?
must you shoulder?
must they shoulder? 	must I be shouldering?
must you be shouldering?
must she be shouldering?
must we be shouldering?
must you be shouldering?
must they be shouldering? 	must I have shouldered?
must you have shouldered?
must she have shouldered?
must we have shouldered?
must you have shouldered?
must they have shouldered? 	must I have been shouldering?
must you have been shouldering?
must she have been shouldering?
must we have been shouldering?
must you have been shouldering?
must they have been shouldering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I shoulder?
mustn't you shoulder?
mustn't she shoulder?
mustn't we shoulder?
mustn't you shoulder?
mustn't they shoulder? 	mustn't I be shouldering?
mustn't you be shouldering?
mustn't she be shouldering?
mustn't we be shouldering?
mustn't you be shouldering?
mustn't they be shouldering? 	mustn't I have shouldered?
mustn't you have shouldered?
mustn't she have shouldered?
mustn't we have shouldered?
mustn't you have shouldered?
mustn't they have shouldered? 	mustn't I have been shouldering?
mustn't you have been shouldering?
mustn't she have been shouldering?
mustn't we have been shouldering?
mustn't you have been shouldering?
mustn't they have been shouldering?