English verb conjugation
MUST PERFECT

Regular verb: perfect - perfected - perfected

Affirmation

Simple form	V-ing form
I must perfect you must perfect he must perfect we must perfect you must perfect they must perfect	I must be perfecting you must be perfecting he must be perfecting we must be perfecting you must be perfecting they must be perfecting
Perfect	V-ing perfect
I must have perfected you must have perfected he must have perfected we must have perfected you must have perfected they must have perfected	I must have been perfecting you must have been perfecting he must have been perfecting we must have been perfecting you must have been perfecting they must have been perfecting

Negation

Simple form	V-ing form
I mustn't perfect you mustn't perfect he mustn't perfect we mustn't perfect you mustn't perfect they mustn't perfect	I mustn't be perfecting you mustn't be perfecting he mustn't be perfecting we mustn't be perfecting you mustn't be perfecting they mustn't be perfecting
Perfect	V-ing perfect
I mustn't have perfected you mustn't have perfected he mustn't have perfected we mustn't have perfected you mustn't have perfected they mustn't have perfected	I mustn't have been perfecting you mustn't have been perfecting he mustn't have been perfecting we mustn't have been perfecting you mustn't have been perfecting they mustn't have been perfecting

Interrogative form

Simple form	V-ing form
must I perfect? must you perfect? must he perfect? must we perfect? must you perfect? must they perfect?	must I be perfecting? must you be perfecting? must he be perfecting? must we be perfecting? must you be perfecting? must they be perfecting?
Perfect	V-ing perfect
must I have perfected? must you have perfected? must he have perfected? must we have perfected? must you have perfected? must they have perfected?	must I have been perfecting? must you have been perfecting? must he have been perfecting? must we have been perfecting? must you have been perfecting? must they have been perfecting?

Interro-negative form

Simple form	V-ing form
mustn't I perfect? mustn't you perfect? mustn't he perfect? mustn't we perfect? mustn't you perfect? mustn't they perfect?	mustn't I be perfecting? mustn't you be perfecting? mustn't he be perfecting? mustn't we be perfecting? mustn't you be perfecting? mustn't they be perfecting?
Perfect	V-ing perfect
mustn't I have perfected? mustn't you have perfected? mustn't he have perfected? mustn't we have perfected? mustn't you have perfected? mustn't they have perfected?	mustn't I have been perfecting? mustn't you have been perfecting? mustn't he have been perfecting? mustn't we have been perfecting? mustn't you have been perfecting? mustn't they have been perfecting?