I must air-ship you must air-ship he must air-ship we must air-ship you must air-ship they must air-ship
V-ing form
I must be air-shiping you must be air-shiping he must be air-shiping we must be air-shiping you must be air-shiping they must be air-shiping
Perfect
I must have air-shiped you must have air-shiped he must have air-shiped we must have air-shiped you must have air-shiped they must have air-shiped
V-ing perfect
I must have been air-shiping you must have been air-shiping he must have been air-shiping we must have been air-shiping you must have been air-shiping they must have been air-shiping
Negation
Simple form
I mustn't air-ship you mustn't air-ship he mustn't air-ship we mustn't air-ship you mustn't air-ship they mustn't air-ship
V-ing form
I mustn't be air-shiping you mustn't be air-shiping he mustn't be air-shiping we mustn't be air-shiping you mustn't be air-shiping they mustn't be air-shiping
Perfect
I mustn't have air-shiped you mustn't have air-shiped he mustn't have air-shiped we mustn't have air-shiped you mustn't have air-shiped they mustn't have air-shiped
V-ing perfect
I mustn't have been air-shiping you mustn't have been air-shiping he mustn't have been air-shiping we mustn't have been air-shiping you mustn't have been air-shiping they mustn't have been air-shiping
Interrogative form
Simple form
must I air-ship? must you air-ship? must he air-ship? must we air-ship? must you air-ship? must they air-ship?
V-ing form
must I be air-shiping? must you be air-shiping? must he be air-shiping? must we be air-shiping? must you be air-shiping? must they be air-shiping?
Perfect
must I have air-shiped? must you have air-shiped? must he have air-shiped? must we have air-shiped? must you have air-shiped? must they have air-shiped?
V-ing perfect
must I have been air-shiping? must you have been air-shiping? must he have been air-shiping? must we have been air-shiping? must you have been air-shiping? must they have been air-shiping?
Interro-negative form
Simple form
mustn't I air-ship? mustn't you air-ship? mustn't he air-ship? mustn't we air-ship? mustn't you air-ship? mustn't they air-ship?
V-ing form
mustn't I be air-shiping? mustn't you be air-shiping? mustn't he be air-shiping? mustn't we be air-shiping? mustn't you be air-shiping? mustn't they be air-shiping?
Perfect
mustn't I have air-shiped? mustn't you have air-shiped? mustn't he have air-shiped? mustn't we have air-shiped? mustn't you have air-shiped? mustn't they have air-shiped?
V-ing perfect
mustn't I have been air-shiping? mustn't you have been air-shiping? mustn't he have been air-shiping? mustn't we have been air-shiping? mustn't you have been air-shiping? mustn't they have been air-shiping?