must slump
Regular verb: slump - slumped- slumped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must slump
you must slump
she must slump
we must slump
you must slump
they must slump 	I must be slumping
you must be slumping
she must be slumping
we must be slumping
you must be slumping
they must be slumping	I must have slumped
you must have slumped
she must have slumped
we must have slumped
you must have slumped
they must have slumped	I must have been slumping
you must have been slumping
she must have been slumping
we must have been slumping
you must have been slumping
they must have been slumping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not slump
you must not slump
she must not slump
we must not slump
you must not slump
they must not slump 	I must not be slumping
you must not be slumping
she must not be slumping
we must not be slumping
you must not be slumping
they must not be slumping	I must not have slumped
you must not have slumped
she must not have slumped
we must not have slumped
you must not have slumped
they must not have slumped	I must not have been slumping
you must not have been slumping
she must not have been slumping
we must not have been slumping
you must not have been slumping
they must not have been slumping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I slump?
must you slump?
must she slump?
must we slump?
must you slump?
must they slump? 	must I be slumping?
must you be slumping?
must she be slumping?
must we be slumping?
must you be slumping?
must they be slumping? 	must I have slumped?
must you have slumped?
must she have slumped?
must we have slumped?
must you have slumped?
must they have slumped? 	must I have been slumping?
must you have been slumping?
must she have been slumping?
must we have been slumping?
must you have been slumping?
must they have been slumping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not slump?
must you not slump?
must she not slump?
must we not slump?
must you not slump?
must they not slump? 	must I not be slumping?
must you not be slumping?
must she not be slumping?
must we not be slumping?
must you not be slumping?
must they not be slumping? 	must I not have slumped?
must you not have slumped?
must she not have slumped?
must we not have slumped?
must you not have slumped?
must they not have slumped? 	must I not have been slumping?
must you not have been slumping?
must she not have been slumping?
must we not have been slumping?
must you not have been slumping?
must they not have been slumping?