English verb conjugation
MUST UNDERPRODUCE

Regular verb: underproduce - underproduced - underproduced

Affirmation

Simple form	V-ing form
I must underproduce you must underproduce he must underproduce we must underproduce you must underproduce they must underproduce	I must be underproducing you must be underproducing he must be underproducing we must be underproducing you must be underproducing they must be underproducing
Perfect	V-ing perfect
I must have underproduced you must have underproduced he must have underproduced we must have underproduced you must have underproduced they must have underproduced	I must have been underproducing you must have been underproducing he must have been underproducing we must have been underproducing you must have been underproducing they must have been underproducing

Negation

Simple form	V-ing form
I mustn't underproduce you mustn't underproduce he mustn't underproduce we mustn't underproduce you mustn't underproduce they mustn't underproduce	I mustn't be underproducing you mustn't be underproducing he mustn't be underproducing we mustn't be underproducing you mustn't be underproducing they mustn't be underproducing
Perfect	V-ing perfect
I mustn't have underproduced you mustn't have underproduced he mustn't have underproduced we mustn't have underproduced you mustn't have underproduced they mustn't have underproduced	I mustn't have been underproducing you mustn't have been underproducing he mustn't have been underproducing we mustn't have been underproducing you mustn't have been underproducing they mustn't have been underproducing

Interrogative form

Simple form	V-ing form
must I underproduce? must you underproduce? must he underproduce? must we underproduce? must you underproduce? must they underproduce?	must I be underproducing? must you be underproducing? must he be underproducing? must we be underproducing? must you be underproducing? must they be underproducing?
Perfect	V-ing perfect
must I have underproduced? must you have underproduced? must he have underproduced? must we have underproduced? must you have underproduced? must they have underproduced?	must I have been underproducing? must you have been underproducing? must he have been underproducing? must we have been underproducing? must you have been underproducing? must they have been underproducing?

Interro-negative form

Simple form	V-ing form
mustn't I underproduce? mustn't you underproduce? mustn't he underproduce? mustn't we underproduce? mustn't you underproduce? mustn't they underproduce?	mustn't I be underproducing? mustn't you be underproducing? mustn't he be underproducing? mustn't we be underproducing? mustn't you be underproducing? mustn't they be underproducing?
Perfect	V-ing perfect
mustn't I have underproduced? mustn't you have underproduced? mustn't he have underproduced? mustn't we have underproduced? mustn't you have underproduced? mustn't they have underproduced?	mustn't I have been underproducing? mustn't you have been underproducing? mustn't he have been underproducing? mustn't we have been underproducing? mustn't you have been underproducing? mustn't they have been underproducing?