must pack
Regular verb: pack - packed- packed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must pack
you must pack
he must pack
we must pack
you must pack
they must pack 	I must be packing
you must be packing
he must be packing
we must be packing
you must be packing
they must be packing	I must have packed
you must have packed
he must have packed
we must have packed
you must have packed
they must have packed	I must have been packing
you must have been packing
he must have been packing
we must have been packing
you must have been packing
they must have been packing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't pack
you mustn't pack
he mustn't pack
we mustn't pack
you mustn't pack
they mustn't pack 	I mustn't be packing
you mustn't be packing
he mustn't be packing
we mustn't be packing
you mustn't be packing
they mustn't be packing	I mustn't have packed
you mustn't have packed
he mustn't have packed
we mustn't have packed
you mustn't have packed
they mustn't have packed	I mustn't have been packing
you mustn't have been packing
he mustn't have been packing
we mustn't have been packing
you mustn't have been packing
they mustn't have been packing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I pack?
must you pack?
must he pack?
must we pack?
must you pack?
must they pack? 	must I be packing?
must you be packing?
must he be packing?
must we be packing?
must you be packing?
must they be packing? 	must I have packed?
must you have packed?
must he have packed?
must we have packed?
must you have packed?
must they have packed? 	must I have been packing?
must you have been packing?
must he have been packing?
must we have been packing?
must you have been packing?
must they have been packing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I pack?
mustn't you pack?
mustn't he pack?
mustn't we pack?
mustn't you pack?
mustn't they pack? 	mustn't I be packing?
mustn't you be packing?
mustn't he be packing?
mustn't we be packing?
mustn't you be packing?
mustn't they be packing? 	mustn't I have packed?
mustn't you have packed?
mustn't he have packed?
mustn't we have packed?
mustn't you have packed?
mustn't they have packed? 	mustn't I have been packing?
mustn't you have been packing?
mustn't he have been packing?
mustn't we have been packing?
mustn't you have been packing?
mustn't they have been packing?