I must immobilize you must immobilize she must immobilize we must immobilize you must immobilize they must immobilize
V-ing form
I must be immobilizing you must be immobilizing she must be immobilizing we must be immobilizing you must be immobilizing they must be immobilizing
Perfect
I must have immobilized you must have immobilized she must have immobilized we must have immobilized you must have immobilized they must have immobilized
V-ing perfect
I must have been immobilizing you must have been immobilizing she must have been immobilizing we must have been immobilizing you must have been immobilizing they must have been immobilizing
Negation
Simple form
I mustn't immobilize you mustn't immobilize she mustn't immobilize we mustn't immobilize you mustn't immobilize they mustn't immobilize
V-ing form
I mustn't be immobilizing you mustn't be immobilizing she mustn't be immobilizing we mustn't be immobilizing you mustn't be immobilizing they mustn't be immobilizing
Perfect
I mustn't have immobilized you mustn't have immobilized she mustn't have immobilized we mustn't have immobilized you mustn't have immobilized they mustn't have immobilized
V-ing perfect
I mustn't have been immobilizing you mustn't have been immobilizing she mustn't have been immobilizing we mustn't have been immobilizing you mustn't have been immobilizing they mustn't have been immobilizing
Interrogative form
Simple form
must I immobilize? must you immobilize? must she immobilize? must we immobilize? must you immobilize? must they immobilize?
V-ing form
must I be immobilizing? must you be immobilizing? must she be immobilizing? must we be immobilizing? must you be immobilizing? must they be immobilizing?
Perfect
must I have immobilized? must you have immobilized? must she have immobilized? must we have immobilized? must you have immobilized? must they have immobilized?
V-ing perfect
must I have been immobilizing? must you have been immobilizing? must she have been immobilizing? must we have been immobilizing? must you have been immobilizing? must they have been immobilizing?
Interro-negative form
Simple form
mustn't I immobilize? mustn't you immobilize? mustn't she immobilize? mustn't we immobilize? mustn't you immobilize? mustn't they immobilize?
V-ing form
mustn't I be immobilizing? mustn't you be immobilizing? mustn't she be immobilizing? mustn't we be immobilizing? mustn't you be immobilizing? mustn't they be immobilizing?
Perfect
mustn't I have immobilized? mustn't you have immobilized? mustn't she have immobilized? mustn't we have immobilized? mustn't you have immobilized? mustn't they have immobilized?
V-ing perfect
mustn't I have been immobilizing? mustn't you have been immobilizing? mustn't she have been immobilizing? mustn't we have been immobilizing? mustn't you have been immobilizing? mustn't they have been immobilizing?