must plump
Regular verb: plump - plumped- plumped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must plump
you must plump
he must plump
we must plump
you must plump
they must plump 	I must be plumping
you must be plumping
he must be plumping
we must be plumping
you must be plumping
they must be plumping	I must have plumped
you must have plumped
he must have plumped
we must have plumped
you must have plumped
they must have plumped	I must have been plumping
you must have been plumping
he must have been plumping
we must have been plumping
you must have been plumping
they must have been plumping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not plump
you must not plump
he must not plump
we must not plump
you must not plump
they must not plump 	I must not be plumping
you must not be plumping
he must not be plumping
we must not be plumping
you must not be plumping
they must not be plumping	I must not have plumped
you must not have plumped
he must not have plumped
we must not have plumped
you must not have plumped
they must not have plumped	I must not have been plumping
you must not have been plumping
he must not have been plumping
we must not have been plumping
you must not have been plumping
they must not have been plumping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I plump?
must you plump?
must he plump?
must we plump?
must you plump?
must they plump? 	must I be plumping?
must you be plumping?
must he be plumping?
must we be plumping?
must you be plumping?
must they be plumping? 	must I have plumped?
must you have plumped?
must he have plumped?
must we have plumped?
must you have plumped?
must they have plumped? 	must I have been plumping?
must you have been plumping?
must he have been plumping?
must we have been plumping?
must you have been plumping?
must they have been plumping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not plump?
must you not plump?
must he not plump?
must we not plump?
must you not plump?
must they not plump? 	must I not be plumping?
must you not be plumping?
must he not be plumping?
must we not be plumping?
must you not be plumping?
must they not be plumping? 	must I not have plumped?
must you not have plumped?
must he not have plumped?
must we not have plumped?
must you not have plumped?
must they not have plumped? 	must I not have been plumping?
must you not have been plumping?
must he not have been plumping?
must we not have been plumping?
must you not have been plumping?
must they not have been plumping?