I must invigorate you must invigorate he must invigorate we must invigorate you must invigorate they must invigorate
V-ing form
I must be invigorating you must be invigorating he must be invigorating we must be invigorating you must be invigorating they must be invigorating
Perfect
I must have invigorated you must have invigorated he must have invigorated we must have invigorated you must have invigorated they must have invigorated
V-ing perfect
I must have been invigorating you must have been invigorating he must have been invigorating we must have been invigorating you must have been invigorating they must have been invigorating
Negation
Simple form
I must not invigorate you must not invigorate he must not invigorate we must not invigorate you must not invigorate they must not invigorate
V-ing form
I must not be invigorating you must not be invigorating he must not be invigorating we must not be invigorating you must not be invigorating they must not be invigorating
Perfect
I must not have invigorated you must not have invigorated he must not have invigorated we must not have invigorated you must not have invigorated they must not have invigorated
V-ing perfect
I must not have been invigorating you must not have been invigorating he must not have been invigorating we must not have been invigorating you must not have been invigorating they must not have been invigorating
Interrogative form
Simple form
must I invigorate? must you invigorate? must he invigorate? must we invigorate? must you invigorate? must they invigorate?
V-ing form
must I be invigorating? must you be invigorating? must he be invigorating? must we be invigorating? must you be invigorating? must they be invigorating?
Perfect
must I have invigorated? must you have invigorated? must he have invigorated? must we have invigorated? must you have invigorated? must they have invigorated?
V-ing perfect
must I have been invigorating? must you have been invigorating? must he have been invigorating? must we have been invigorating? must you have been invigorating? must they have been invigorating?
Interro-negative form
Simple form
must I not invigorate? must you not invigorate? must he not invigorate? must we not invigorate? must you not invigorate? must they not invigorate?
V-ing form
must I not be invigorating? must you not be invigorating? must he not be invigorating? must we not be invigorating? must you not be invigorating? must they not be invigorating?
Perfect
must I not have invigorated? must you not have invigorated? must he not have invigorated? must we not have invigorated? must you not have invigorated? must they not have invigorated?
V-ing perfect
must I not have been invigorating? must you not have been invigorating? must he not have been invigorating? must we not have been invigorating? must you not have been invigorating? must they not have been invigorating?