I must stabilize you must stabilize he must stabilize we must stabilize you must stabilize they must stabilize
V-ing form
I must be stabilizing you must be stabilizing he must be stabilizing we must be stabilizing you must be stabilizing they must be stabilizing
Perfect
I must have stabilized you must have stabilized he must have stabilized we must have stabilized you must have stabilized they must have stabilized
V-ing perfect
I must have been stabilizing you must have been stabilizing he must have been stabilizing we must have been stabilizing you must have been stabilizing they must have been stabilizing
Negation
Simple form
I must not stabilize you must not stabilize he must not stabilize we must not stabilize you must not stabilize they must not stabilize
V-ing form
I must not be stabilizing you must not be stabilizing he must not be stabilizing we must not be stabilizing you must not be stabilizing they must not be stabilizing
Perfect
I must not have stabilized you must not have stabilized he must not have stabilized we must not have stabilized you must not have stabilized they must not have stabilized
V-ing perfect
I must not have been stabilizing you must not have been stabilizing he must not have been stabilizing we must not have been stabilizing you must not have been stabilizing they must not have been stabilizing
Interrogative form
Simple form
must I stabilize? must you stabilize? must he stabilize? must we stabilize? must you stabilize? must they stabilize?
V-ing form
must I be stabilizing? must you be stabilizing? must he be stabilizing? must we be stabilizing? must you be stabilizing? must they be stabilizing?
Perfect
must I have stabilized? must you have stabilized? must he have stabilized? must we have stabilized? must you have stabilized? must they have stabilized?
V-ing perfect
must I have been stabilizing? must you have been stabilizing? must he have been stabilizing? must we have been stabilizing? must you have been stabilizing? must they have been stabilizing?
Interro-negative form
Simple form
must I not stabilize? must you not stabilize? must he not stabilize? must we not stabilize? must you not stabilize? must they not stabilize?
V-ing form
must I not be stabilizing? must you not be stabilizing? must he not be stabilizing? must we not be stabilizing? must you not be stabilizing? must they not be stabilizing?
Perfect
must I not have stabilized? must you not have stabilized? must he not have stabilized? must we not have stabilized? must you not have stabilized? must they not have stabilized?
V-ing perfect
must I not have been stabilizing? must you not have been stabilizing? must he not have been stabilizing? must we not have been stabilizing? must you not have been stabilizing? must they not have been stabilizing?