English verb conjugation
MUST PENETRATE

Regular verb: penetrate - penetrated - penetrated

Affirmation

Simple form	V-ing form
I must penetrate you must penetrate he must penetrate we must penetrate you must penetrate they must penetrate	I must be penetrating you must be penetrating he must be penetrating we must be penetrating you must be penetrating they must be penetrating
Perfect	V-ing perfect
I must have penetrated you must have penetrated he must have penetrated we must have penetrated you must have penetrated they must have penetrated	I must have been penetrating you must have been penetrating he must have been penetrating we must have been penetrating you must have been penetrating they must have been penetrating

Negation

Simple form	V-ing form
I must not penetrate you must not penetrate he must not penetrate we must not penetrate you must not penetrate they must not penetrate	I must not be penetrating you must not be penetrating he must not be penetrating we must not be penetrating you must not be penetrating they must not be penetrating
Perfect	V-ing perfect
I must not have penetrated you must not have penetrated he must not have penetrated we must not have penetrated you must not have penetrated they must not have penetrated	I must not have been penetrating you must not have been penetrating he must not have been penetrating we must not have been penetrating you must not have been penetrating they must not have been penetrating

Interrogative form

Simple form	V-ing form
must I penetrate? must you penetrate? must he penetrate? must we penetrate? must you penetrate? must they penetrate?	must I be penetrating? must you be penetrating? must he be penetrating? must we be penetrating? must you be penetrating? must they be penetrating?
Perfect	V-ing perfect
must I have penetrated? must you have penetrated? must he have penetrated? must we have penetrated? must you have penetrated? must they have penetrated?	must I have been penetrating? must you have been penetrating? must he have been penetrating? must we have been penetrating? must you have been penetrating? must they have been penetrating?

Interro-negative form

Simple form	V-ing form
must I not penetrate? must you not penetrate? must he not penetrate? must we not penetrate? must you not penetrate? must they not penetrate?	must I not be penetrating? must you not be penetrating? must he not be penetrating? must we not be penetrating? must you not be penetrating? must they not be penetrating?
Perfect	V-ing perfect
must I not have penetrated? must you not have penetrated? must he not have penetrated? must we not have penetrated? must you not have penetrated? must they not have penetrated?	must I not have been penetrating? must you not have been penetrating? must he not have been penetrating? must we not have been penetrating? must you not have been penetrating? must they not have been penetrating?