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