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