English verb conjugation
MUST POSTPONE

Regular verb: postpone - postponed - postponed

Affirmation

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