I must shoe you must shoe he must shoe we must shoe you must shoe they must shoe
V-ing form
I must be shoing you must be shoing he must be shoing we must be shoing you must be shoing they must be shoing
Perfect
I must have shod, shoed you must have shod, shoed he must have shod, shoed we must have shod, shoed you must have shod, shoed they must have shod, shoed
V-ing perfect
I must have been shoing you must have been shoing he must have been shoing we must have been shoing you must have been shoing they must have been shoing
Negation
Simple form
I mustn't shoe you mustn't shoe he mustn't shoe we mustn't shoe you mustn't shoe they mustn't shoe
V-ing form
I mustn't be shoing you mustn't be shoing he mustn't be shoing we mustn't be shoing you mustn't be shoing they mustn't be shoing
Perfect
I mustn't have shod, shoed you mustn't have shod, shoed he mustn't have shod, shoed we mustn't have shod, shoed you mustn't have shod, shoed they mustn't have shod, shoed
V-ing perfect
I mustn't have been shoing you mustn't have been shoing he mustn't have been shoing we mustn't have been shoing you mustn't have been shoing they mustn't have been shoing
Interrogative form
Simple form
must I shoe? must you shoe? must he shoe? must we shoe? must you shoe? must they shoe?
V-ing form
must I be shoing? must you be shoing? must he be shoing? must we be shoing? must you be shoing? must they be shoing?
Perfect
must I have shod, shoed? must you have shod, shoed? must he have shod, shoed? must we have shod, shoed? must you have shod, shoed? must they have shod, shoed?
V-ing perfect
must I have been shoing? must you have been shoing? must he have been shoing? must we have been shoing? must you have been shoing? must they have been shoing?
Interro-negative form
Simple form
mustn't I shoe? mustn't you shoe? mustn't he shoe? mustn't we shoe? mustn't you shoe? mustn't they shoe?
V-ing form
mustn't I be shoing? mustn't you be shoing? mustn't he be shoing? mustn't we be shoing? mustn't you be shoing? mustn't they be shoing?
Perfect
mustn't I have shod, shoed? mustn't you have shod, shoed? mustn't he have shod, shoed? mustn't we have shod, shoed? mustn't you have shod, shoed? mustn't they have shod, shoed?
V-ing perfect
mustn't I have been shoing? mustn't you have been shoing? mustn't he have been shoing? mustn't we have been shoing? mustn't you have been shoing? mustn't they have been shoing?