I can perforate you can perforate he can perforate we can perforate you can perforate they can perforate
V-ing form
I can be perforating you can be perforating he can be perforating we can be perforating you can be perforating they can be perforating
Perfect
I can have perforated you can have perforated he can have perforated we can have perforated you can have perforated they can have perforated
V-ing perfect
I can have been perforating you can have been perforating he can have been perforating we can have been perforating you can have been perforating they can have been perforating
Negation
Simple form
I cannot perforate you cannot perforate he cannot perforate we cannot perforate you cannot perforate they cannot perforate
V-ing form
I cannot be perforating you cannot be perforating he cannot be perforating we cannot be perforating you cannot be perforating they cannot be perforating
Perfect
I cannot have perforated you cannot have perforated he cannot have perforated we cannot have perforated you cannot have perforated they cannot have perforated
V-ing perfect
I cannot have been perforating you cannot have been perforating he cannot have been perforating we cannot have been perforating you cannot have been perforating they cannot have been perforating
Interrogative form
Simple form
can I perforate? can you perforate? can he perforate? can we perforate? can you perforate? can they perforate?
V-ing form
can I be perforating? can you be perforating? can he be perforating? can we be perforating? can you be perforating? can they be perforating?
Perfect
can I have perforated? can you have perforated? can he have perforated? can we have perforated? can you have perforated? can they have perforated?
V-ing perfect
can I have been perforating? can you have been perforating? can he have been perforating? can we have been perforating? can you have been perforating? can they have been perforating?
Interro-negative form
Simple form
can I not perforate? can you not perforate? can he not perforate? can we not perforate? can you not perforate? can they not perforate?
V-ing form
can I not be perforating? can you not be perforating? can he not be perforating? can we not be perforating? can you not be perforating? can they not be perforating?
Perfect
can I not have perforated? can you not have perforated? can he not have perforated? can we not have perforated? can you not have perforated? can they not have perforated?
V-ing perfect
can I not have been perforating? can you not have been perforating? can he not have been perforating? can we not have been perforating? can you not have been perforating? can they not have been perforating?