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