I must paint you must paint he must paint we must paint you must paint they must paint
V-ing form
I must be painting you must be painting he must be painting we must be painting you must be painting they must be painting
Perfect
I must have painted you must have painted he must have painted we must have painted you must have painted they must have painted
V-ing perfect
I must have been painting you must have been painting he must have been painting we must have been painting you must have been painting they must have been painting
Negation
Simple form
I must not paint you must not paint he must not paint we must not paint you must not paint they must not paint
V-ing form
I must not be painting you must not be painting he must not be painting we must not be painting you must not be painting they must not be painting
Perfect
I must not have painted you must not have painted he must not have painted we must not have painted you must not have painted they must not have painted
V-ing perfect
I must not have been painting you must not have been painting he must not have been painting we must not have been painting you must not have been painting they must not have been painting
Interrogative form
Simple form
must I paint? must you paint? must he paint? must we paint? must you paint? must they paint?
V-ing form
must I be painting? must you be painting? must he be painting? must we be painting? must you be painting? must they be painting?
Perfect
must I have painted? must you have painted? must he have painted? must we have painted? must you have painted? must they have painted?
V-ing perfect
must I have been painting? must you have been painting? must he have been painting? must we have been painting? must you have been painting? must they have been painting?
Interro-negative form
Simple form
must I not paint? must you not paint? must he not paint? must we not paint? must you not paint? must they not paint?
V-ing form
must I not be painting? must you not be painting? must he not be painting? must we not be painting? must you not be painting? must they not be painting?
Perfect
must I not have painted? must you not have painted? must he not have painted? must we not have painted? must you not have painted? must they not have painted?
V-ing perfect
must I not have been painting? must you not have been painting? must he not have been painting? must we not have been painting? must you not have been painting? must they not have been painting?