English verb conjugation
MUST PRACTICE

Regular verb: practice - practiced - practiced

Affirmation

Simple form	V-ing form
I must practice you must practice he must practice we must practice you must practice they must practice	I must be practicing you must be practicing he must be practicing we must be practicing you must be practicing they must be practicing
Perfect	V-ing perfect
I must have practiced you must have practiced he must have practiced we must have practiced you must have practiced they must have practiced	I must have been practicing you must have been practicing he must have been practicing we must have been practicing you must have been practicing they must have been practicing

Negation

Simple form	V-ing form
I mustn't practice you mustn't practice he mustn't practice we mustn't practice you mustn't practice they mustn't practice	I mustn't be practicing you mustn't be practicing he mustn't be practicing we mustn't be practicing you mustn't be practicing they mustn't be practicing
Perfect	V-ing perfect
I mustn't have practiced you mustn't have practiced he mustn't have practiced we mustn't have practiced you mustn't have practiced they mustn't have practiced	I mustn't have been practicing you mustn't have been practicing he mustn't have been practicing we mustn't have been practicing you mustn't have been practicing they mustn't have been practicing

Interrogative form

Simple form	V-ing form
must I practice? must you practice? must he practice? must we practice? must you practice? must they practice?	must I be practicing? must you be practicing? must he be practicing? must we be practicing? must you be practicing? must they be practicing?
Perfect	V-ing perfect
must I have practiced? must you have practiced? must he have practiced? must we have practiced? must you have practiced? must they have practiced?	must I have been practicing? must you have been practicing? must he have been practicing? must we have been practicing? must you have been practicing? must they have been practicing?

Interro-negative form

Simple form	V-ing form
mustn't I practice? mustn't you practice? mustn't he practice? mustn't we practice? mustn't you practice? mustn't they practice?	mustn't I be practicing? mustn't you be practicing? mustn't he be practicing? mustn't we be practicing? mustn't you be practicing? mustn't they be practicing?
Perfect	V-ing perfect
mustn't I have practiced? mustn't you have practiced? mustn't he have practiced? mustn't we have practiced? mustn't you have practiced? mustn't they have practiced?	mustn't I have been practicing? mustn't you have been practicing? mustn't he have been practicing? mustn't we have been practicing? mustn't you have been practicing? mustn't they have been practicing?