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