I can penetrate you can penetrate she can penetrate we can penetrate you can penetrate they can penetrate
V-ing form
I can be penetrating you can be penetrating she can be penetrating we can be penetrating you can be penetrating they can be penetrating
Perfect
I can have penetrated you can have penetrated she can have penetrated we can have penetrated you can have penetrated they can have penetrated
V-ing perfect
I can have been penetrating you can have been penetrating she can have been penetrating we can have been penetrating you can have been penetrating they can have been penetrating
Negation
Simple form
I cannot penetrate you cannot penetrate she cannot penetrate we cannot penetrate you cannot penetrate they cannot penetrate
V-ing form
I cannot be penetrating you cannot be penetrating she cannot be penetrating we cannot be penetrating you cannot be penetrating they cannot be penetrating
Perfect
I cannot have penetrated you cannot have penetrated she cannot have penetrated we cannot have penetrated you cannot have penetrated they cannot have penetrated
V-ing perfect
I cannot have been penetrating you cannot have been penetrating she cannot have been penetrating we cannot have been penetrating you cannot have been penetrating they cannot have been penetrating
Interrogative form
Simple form
can I penetrate? can you penetrate? can she penetrate? can we penetrate? can you penetrate? can they penetrate?
V-ing form
can I be penetrating? can you be penetrating? can she be penetrating? can we be penetrating? can you be penetrating? can they be penetrating?
Perfect
can I have penetrated? can you have penetrated? can she have penetrated? can we have penetrated? can you have penetrated? can they have penetrated?
V-ing perfect
can I have been penetrating? can you have been penetrating? can she have been penetrating? can we have been penetrating? can you have been penetrating? can they have been penetrating?
Interro-negative form
Simple form
can I not penetrate? can you not penetrate? can she not penetrate? can we not penetrate? can you not penetrate? can they not penetrate?
V-ing form
can I not be penetrating? can you not be penetrating? can she not be penetrating? can we not be penetrating? can you not be penetrating? can they not be penetrating?
Perfect
can I not have penetrated? can you not have penetrated? can she not have penetrated? can we not have penetrated? can you not have penetrated? can they not have penetrated?
V-ing perfect
can I not have been penetrating? can you not have been penetrating? can she not have been penetrating? can we not have been penetrating? can you not have been penetrating? can they not have been penetrating?