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