I must parachute you must parachute he must parachute we must parachute you must parachute they must parachute
V-ing form
I must be parachuting you must be parachuting he must be parachuting we must be parachuting you must be parachuting they must be parachuting
Perfect
I must have parachuted you must have parachuted he 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 he 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 he 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 he 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 he 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 he 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 he parachute? must we parachute? must you parachute? must they parachute?
V-ing form
must I be parachuting? must you be parachuting? must he be parachuting? must we be parachuting? must you be parachuting? must they be parachuting?
Perfect
must I have parachuted? must you have parachuted? must he 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 he 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 he 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 he 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 he 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 he have been parachuting? mustn't we have been parachuting? mustn't you have been parachuting? mustn't they have been parachuting?