must slumber
Regular verb: slumber - slumbered- slumbered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must slumber
you must slumber
she must slumber
we must slumber
you must slumber
they must slumber 	I must be slumbering
you must be slumbering
she must be slumbering
we must be slumbering
you must be slumbering
they must be slumbering	I must have slumbered
you must have slumbered
she must have slumbered
we must have slumbered
you must have slumbered
they must have slumbered	I must have been slumbering
you must have been slumbering
she must have been slumbering
we must have been slumbering
you must have been slumbering
they must have been slumbering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't slumber
you mustn't slumber
she mustn't slumber
we mustn't slumber
you mustn't slumber
they mustn't slumber 	I mustn't be slumbering
you mustn't be slumbering
she mustn't be slumbering
we mustn't be slumbering
you mustn't be slumbering
they mustn't be slumbering	I mustn't have slumbered
you mustn't have slumbered
she mustn't have slumbered
we mustn't have slumbered
you mustn't have slumbered
they mustn't have slumbered	I mustn't have been slumbering
you mustn't have been slumbering
she mustn't have been slumbering
we mustn't have been slumbering
you mustn't have been slumbering
they mustn't have been slumbering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I slumber?
must you slumber?
must she slumber?
must we slumber?
must you slumber?
must they slumber? 	must I be slumbering?
must you be slumbering?
must she be slumbering?
must we be slumbering?
must you be slumbering?
must they be slumbering? 	must I have slumbered?
must you have slumbered?
must she have slumbered?
must we have slumbered?
must you have slumbered?
must they have slumbered? 	must I have been slumbering?
must you have been slumbering?
must she have been slumbering?
must we have been slumbering?
must you have been slumbering?
must they have been slumbering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I slumber?
mustn't you slumber?
mustn't she slumber?
mustn't we slumber?
mustn't you slumber?
mustn't they slumber? 	mustn't I be slumbering?
mustn't you be slumbering?
mustn't she be slumbering?
mustn't we be slumbering?
mustn't you be slumbering?
mustn't they be slumbering? 	mustn't I have slumbered?
mustn't you have slumbered?
mustn't she have slumbered?
mustn't we have slumbered?
mustn't you have slumbered?
mustn't they have slumbered? 	mustn't I have been slumbering?
mustn't you have been slumbering?
mustn't she have been slumbering?
mustn't we have been slumbering?
mustn't you have been slumbering?
mustn't they have been slumbering?