must pack
Regular verb: pack - packed- packed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must pack
you must pack
she must pack
we must pack
you must pack
they must pack 	I must be packing
you must be packing
she must be packing
we must be packing
you must be packing
they must be packing	I must have packed
you must have packed
she 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
she 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
she 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
she 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
she 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
she 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 she pack?
must we pack?
must you pack?
must they pack? 	must I be packing?
must you be packing?
must she be packing?
must we be packing?
must you be packing?
must they be packing? 	must I have packed?
must you have packed?
must she 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 she 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 she 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 she 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 she 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 she have been packing?
mustn't we have been packing?
mustn't you have been packing?
mustn't they have been packing?