I must catapult you must catapult she must catapult we must catapult you must catapult they must catapult
V-ing form
I must be catapulting you must be catapulting she must be catapulting we must be catapulting you must be catapulting they must be catapulting
Perfect
I must have catapulted you must have catapulted she 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 she 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 she 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 she 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 she 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 she 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 she catapult? must we catapult? must you catapult? must they catapult?
V-ing form
must I be catapulting? must you be catapulting? must she be catapulting? must we be catapulting? must you be catapulting? must they be catapulting?
Perfect
must I have catapulted? must you have catapulted? must she 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 she 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 she 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 she 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 she 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 she have been catapulting? mustn't we have been catapulting? mustn't you have been catapulting? mustn't they have been catapulting?