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