I must concretize you must concretize he must concretize we must concretize you must concretize they must concretize
V-ing form
I must be concretizing you must be concretizing he must be concretizing we must be concretizing you must be concretizing they must be concretizing
Perfect
I must have concretized you must have concretized he must have concretized we must have concretized you must have concretized they must have concretized
V-ing perfect
I must have been concretizing you must have been concretizing he must have been concretizing we must have been concretizing you must have been concretizing they must have been concretizing
Negation
Simple form
I must not concretize you must not concretize he must not concretize we must not concretize you must not concretize they must not concretize
V-ing form
I must not be concretizing you must not be concretizing he must not be concretizing we must not be concretizing you must not be concretizing they must not be concretizing
Perfect
I must not have concretized you must not have concretized he must not have concretized we must not have concretized you must not have concretized they must not have concretized
V-ing perfect
I must not have been concretizing you must not have been concretizing he must not have been concretizing we must not have been concretizing you must not have been concretizing they must not have been concretizing
Interrogative form
Simple form
must I concretize? must you concretize? must he concretize? must we concretize? must you concretize? must they concretize?
V-ing form
must I be concretizing? must you be concretizing? must he be concretizing? must we be concretizing? must you be concretizing? must they be concretizing?
Perfect
must I have concretized? must you have concretized? must he have concretized? must we have concretized? must you have concretized? must they have concretized?
V-ing perfect
must I have been concretizing? must you have been concretizing? must he have been concretizing? must we have been concretizing? must you have been concretizing? must they have been concretizing?
Interro-negative form
Simple form
must I not concretize? must you not concretize? must he not concretize? must we not concretize? must you not concretize? must they not concretize?
V-ing form
must I not be concretizing? must you not be concretizing? must he not be concretizing? must we not be concretizing? must you not be concretizing? must they not be concretizing?
Perfect
must I not have concretized? must you not have concretized? must he not have concretized? must we not have concretized? must you not have concretized? must they not have concretized?
V-ing perfect
must I not have been concretizing? must you not have been concretizing? must he not have been concretizing? must we not have been concretizing? must you not have been concretizing? must they not have been concretizing?