I must lame you must lame he must lame we must lame you must lame they must lame
V-ing form
I must be laming you must be laming he must be laming we must be laming you must be laming they must be laming
Perfect
I must have lamed you must have lamed he 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 he 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 he 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 he 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 he 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 he 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 he lame? must we lame? must you lame? must they lame?
V-ing form
must I be laming? must you be laming? must he be laming? must we be laming? must you be laming? must they be laming?
Perfect
must I have lamed? must you have lamed? must he 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 he 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 he 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 he 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 he 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 he have been laming? mustn't we have been laming? mustn't you have been laming? mustn't they have been laming?