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 must not slumber
you must not slumber
she must not slumber
we must not slumber
you must not slumber
they must not slumber 	I must not be slumbering
you must not be slumbering
she must not be slumbering
we must not be slumbering
you must not be slumbering
they must not be slumbering	I must not have slumbered
you must not have slumbered
she must not have slumbered
we must not have slumbered
you must not have slumbered
they must not have slumbered	I must not have been slumbering
you must not have been slumbering
she must not have been slumbering
we must not have been slumbering
you must not have been slumbering
they must not 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 	
must I not slumber?
must you not slumber?
must she not slumber?
must we not slumber?
must you not slumber?
must they not slumber? 	must I not be slumbering?
must you not be slumbering?
must she not be slumbering?
must we not be slumbering?
must you not be slumbering?
must they not be slumbering? 	must I not have slumbered?
must you not have slumbered?
must she not have slumbered?
must we not have slumbered?
must you not have slumbered?
must they not have slumbered? 	must I not have been slumbering?
must you not have been slumbering?
must she not have been slumbering?
must we not have been slumbering?
must you not have been slumbering?
must they not have been slumbering?