I must depressurize you must depressurize he must depressurize we must depressurize you must depressurize they must depressurize
V-ing form
I must be depressurizing you must be depressurizing he must be depressurizing we must be depressurizing you must be depressurizing they must be depressurizing
Perfect
I must have depressurized you must have depressurized he must have depressurized we must have depressurized you must have depressurized they must have depressurized
V-ing perfect
I must have been depressurizing you must have been depressurizing he must have been depressurizing we must have been depressurizing you must have been depressurizing they must have been depressurizing
Negation
Simple form
I mustn't depressurize you mustn't depressurize he mustn't depressurize we mustn't depressurize you mustn't depressurize they mustn't depressurize
V-ing form
I mustn't be depressurizing you mustn't be depressurizing he mustn't be depressurizing we mustn't be depressurizing you mustn't be depressurizing they mustn't be depressurizing
Perfect
I mustn't have depressurized you mustn't have depressurized he mustn't have depressurized we mustn't have depressurized you mustn't have depressurized they mustn't have depressurized
V-ing perfect
I mustn't have been depressurizing you mustn't have been depressurizing he mustn't have been depressurizing we mustn't have been depressurizing you mustn't have been depressurizing they mustn't have been depressurizing
Interrogative form
Simple form
must I depressurize? must you depressurize? must he depressurize? must we depressurize? must you depressurize? must they depressurize?
V-ing form
must I be depressurizing? must you be depressurizing? must he be depressurizing? must we be depressurizing? must you be depressurizing? must they be depressurizing?
Perfect
must I have depressurized? must you have depressurized? must he have depressurized? must we have depressurized? must you have depressurized? must they have depressurized?
V-ing perfect
must I have been depressurizing? must you have been depressurizing? must he have been depressurizing? must we have been depressurizing? must you have been depressurizing? must they have been depressurizing?
Interro-negative form
Simple form
mustn't I depressurize? mustn't you depressurize? mustn't he depressurize? mustn't we depressurize? mustn't you depressurize? mustn't they depressurize?
V-ing form
mustn't I be depressurizing? mustn't you be depressurizing? mustn't he be depressurizing? mustn't we be depressurizing? mustn't you be depressurizing? mustn't they be depressurizing?
Perfect
mustn't I have depressurized? mustn't you have depressurized? mustn't he have depressurized? mustn't we have depressurized? mustn't you have depressurized? mustn't they have depressurized?
V-ing perfect
mustn't I have been depressurizing? mustn't you have been depressurizing? mustn't he have been depressurizing? mustn't we have been depressurizing? mustn't you have been depressurizing? mustn't they have been depressurizing?