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