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 mustn't penetrate you mustn't penetrate he mustn't penetrate we mustn't penetrate you mustn't penetrate they mustn't penetrate	I mustn't be penetrating you mustn't be penetrating he mustn't be penetrating we mustn't be penetrating you mustn't be penetrating they mustn't be penetrating
Perfect	V-ing perfect
I mustn't have penetrated you mustn't have penetrated he mustn't have penetrated we mustn't have penetrated you mustn't have penetrated they mustn't have penetrated	I mustn't have been penetrating you mustn't have been penetrating he mustn't have been penetrating we mustn't have been penetrating you mustn't have been penetrating they mustn't 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
mustn't I penetrate? mustn't you penetrate? mustn't he penetrate? mustn't we penetrate? mustn't you penetrate? mustn't they penetrate?	mustn't I be penetrating? mustn't you be penetrating? mustn't he be penetrating? mustn't we be penetrating? mustn't you be penetrating? mustn't they be penetrating?
Perfect	V-ing perfect
mustn't I have penetrated? mustn't you have penetrated? mustn't he have penetrated? mustn't we have penetrated? mustn't you have penetrated? mustn't they have penetrated?	mustn't I have been penetrating? mustn't you have been penetrating? mustn't he have been penetrating? mustn't we have been penetrating? mustn't you have been penetrating? mustn't they have been penetrating?