I must gallop you must gallop he must gallop we must gallop you must gallop they must gallop
V-ing form
I must be galloping you must be galloping he must be galloping we must be galloping you must be galloping they must be galloping
Perfect
I must have galloped you must have galloped he must have galloped we must have galloped you must have galloped they must have galloped
V-ing perfect
I must have been galloping you must have been galloping he must have been galloping we must have been galloping you must have been galloping they must have been galloping
Negation
Simple form
I mustn't gallop you mustn't gallop he mustn't gallop we mustn't gallop you mustn't gallop they mustn't gallop
V-ing form
I mustn't be galloping you mustn't be galloping he mustn't be galloping we mustn't be galloping you mustn't be galloping they mustn't be galloping
Perfect
I mustn't have galloped you mustn't have galloped he mustn't have galloped we mustn't have galloped you mustn't have galloped they mustn't have galloped
V-ing perfect
I mustn't have been galloping you mustn't have been galloping he mustn't have been galloping we mustn't have been galloping you mustn't have been galloping they mustn't have been galloping
Interrogative form
Simple form
must I gallop? must you gallop? must he gallop? must we gallop? must you gallop? must they gallop?
V-ing form
must I be galloping? must you be galloping? must he be galloping? must we be galloping? must you be galloping? must they be galloping?
Perfect
must I have galloped? must you have galloped? must he have galloped? must we have galloped? must you have galloped? must they have galloped?
V-ing perfect
must I have been galloping? must you have been galloping? must he have been galloping? must we have been galloping? must you have been galloping? must they have been galloping?
Interro-negative form
Simple form
mustn't I gallop? mustn't you gallop? mustn't he gallop? mustn't we gallop? mustn't you gallop? mustn't they gallop?
V-ing form
mustn't I be galloping? mustn't you be galloping? mustn't he be galloping? mustn't we be galloping? mustn't you be galloping? mustn't they be galloping?
Perfect
mustn't I have galloped? mustn't you have galloped? mustn't he have galloped? mustn't we have galloped? mustn't you have galloped? mustn't they have galloped?
V-ing perfect
mustn't I have been galloping? mustn't you have been galloping? mustn't he have been galloping? mustn't we have been galloping? mustn't you have been galloping? mustn't they have been galloping?