English verb conjugation
MUST PAIN

Regular verb: pain - pained - pained

Affirmation

Simple form	V-ing form
I must pain you must pain he must pain we must pain you must pain they must pain	I must be paining you must be paining he must be paining we must be paining you must be paining they must be paining
Perfect	V-ing perfect
I must have pained you must have pained he must have pained we must have pained you must have pained they must have pained	I must have been paining you must have been paining he must have been paining we must have been paining you must have been paining they must have been paining

Negation

Simple form	V-ing form
I mustn't pain you mustn't pain he mustn't pain we mustn't pain you mustn't pain they mustn't pain	I mustn't be paining you mustn't be paining he mustn't be paining we mustn't be paining you mustn't be paining they mustn't be paining
Perfect	V-ing perfect
I mustn't have pained you mustn't have pained he mustn't have pained we mustn't have pained you mustn't have pained they mustn't have pained	I mustn't have been paining you mustn't have been paining he mustn't have been paining we mustn't have been paining you mustn't have been paining they mustn't have been paining

Interrogative form

Simple form	V-ing form
must I pain? must you pain? must he pain? must we pain? must you pain? must they pain?	must I be paining? must you be paining? must he be paining? must we be paining? must you be paining? must they be paining?
Perfect	V-ing perfect
must I have pained? must you have pained? must he have pained? must we have pained? must you have pained? must they have pained?	must I have been paining? must you have been paining? must he have been paining? must we have been paining? must you have been paining? must they have been paining?

Interro-negative form

Simple form	V-ing form
mustn't I pain? mustn't you pain? mustn't he pain? mustn't we pain? mustn't you pain? mustn't they pain?	mustn't I be paining? mustn't you be paining? mustn't he be paining? mustn't we be paining? mustn't you be paining? mustn't they be paining?
Perfect	V-ing perfect
mustn't I have pained? mustn't you have pained? mustn't he have pained? mustn't we have pained? mustn't you have pained? mustn't they have pained?	mustn't I have been paining? mustn't you have been paining? mustn't he have been paining? mustn't we have been paining? mustn't you have been paining? mustn't they have been paining?