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 mustn't stabilize you mustn't stabilize he mustn't stabilize we mustn't stabilize you mustn't stabilize they mustn't stabilize
V-ing form
I mustn't be stabilizing you mustn't be stabilizing he mustn't be stabilizing we mustn't be stabilizing you mustn't be stabilizing they mustn't be stabilizing
Perfect
I mustn't have stabilized you mustn't have stabilized he mustn't have stabilized we mustn't have stabilized you mustn't have stabilized they mustn't have stabilized
V-ing perfect
I mustn't have been stabilizing you mustn't have been stabilizing he mustn't have been stabilizing we mustn't have been stabilizing you mustn't have been stabilizing they mustn't 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
mustn't I stabilize? mustn't you stabilize? mustn't he stabilize? mustn't we stabilize? mustn't you stabilize? mustn't they stabilize?
V-ing form
mustn't I be stabilizing? mustn't you be stabilizing? mustn't he be stabilizing? mustn't we be stabilizing? mustn't you be stabilizing? mustn't they be stabilizing?
Perfect
mustn't I have stabilized? mustn't you have stabilized? mustn't he have stabilized? mustn't we have stabilized? mustn't you have stabilized? mustn't they have stabilized?
V-ing perfect
mustn't I have been stabilizing? mustn't you have been stabilizing? mustn't he have been stabilizing? mustn't we have been stabilizing? mustn't you have been stabilizing? mustn't they have been stabilizing?