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