must postpone
Regular verb: postpone - postponed- postponed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must postpone
you must postpone
she must postpone
we must postpone
you must postpone
they must postpone 	I must be postponing
you must be postponing
she must be postponing
we must be postponing
you must be postponing
they must be postponing	I must have postponed
you must have postponed
she must have postponed
we must have postponed
you must have postponed
they must have postponed	I must have been postponing
you must have been postponing
she must have been postponing
we must have been postponing
you must have been postponing
they must have been postponing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't postpone
you mustn't postpone
she mustn't postpone
we mustn't postpone
you mustn't postpone
they mustn't postpone 	I mustn't be postponing
you mustn't be postponing
she mustn't be postponing
we mustn't be postponing
you mustn't be postponing
they mustn't be postponing	I mustn't have postponed
you mustn't have postponed
she mustn't have postponed
we mustn't have postponed
you mustn't have postponed
they mustn't have postponed	I mustn't have been postponing
you mustn't have been postponing
she mustn't have been postponing
we mustn't have been postponing
you mustn't have been postponing
they mustn't have been postponing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I postpone?
must you postpone?
must she postpone?
must we postpone?
must you postpone?
must they postpone? 	must I be postponing?
must you be postponing?
must she be postponing?
must we be postponing?
must you be postponing?
must they be postponing? 	must I have postponed?
must you have postponed?
must she have postponed?
must we have postponed?
must you have postponed?
must they have postponed? 	must I have been postponing?
must you have been postponing?
must she have been postponing?
must we have been postponing?
must you have been postponing?
must they have been postponing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I postpone?
mustn't you postpone?
mustn't she postpone?
mustn't we postpone?
mustn't you postpone?
mustn't they postpone? 	mustn't I be postponing?
mustn't you be postponing?
mustn't she be postponing?
mustn't we be postponing?
mustn't you be postponing?
mustn't they be postponing? 	mustn't I have postponed?
mustn't you have postponed?
mustn't she have postponed?
mustn't we have postponed?
mustn't you have postponed?
mustn't they have postponed? 	mustn't I have been postponing?
mustn't you have been postponing?
mustn't she have been postponing?
mustn't we have been postponing?
mustn't you have been postponing?
mustn't they have been postponing?