English verb conjugation
CAN PENETRATE

Regular verb: penetrate - penetrated - penetrated

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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