I must slap you must slap she must slap we must slap you must slap they must slap
V-ing form
I must be slapping you must be slapping she must be slapping we must be slapping you must be slapping they must be slapping
Perfect
I must have slapped you must have slapped she must have slapped we must have slapped you must have slapped they must have slapped
V-ing perfect
I must have been slapping you must have been slapping she must have been slapping we must have been slapping you must have been slapping they must have been slapping
Negation
Simple form
I must not slap you must not slap she must not slap we must not slap you must not slap they must not slap
V-ing form
I must not be slapping you must not be slapping she must not be slapping we must not be slapping you must not be slapping they must not be slapping
Perfect
I must not have slapped you must not have slapped she must not have slapped we must not have slapped you must not have slapped they must not have slapped
V-ing perfect
I must not have been slapping you must not have been slapping she must not have been slapping we must not have been slapping you must not have been slapping they must not have been slapping
Interrogative form
Simple form
must I slap? must you slap? must she slap? must we slap? must you slap? must they slap?
V-ing form
must I be slapping? must you be slapping? must she be slapping? must we be slapping? must you be slapping? must they be slapping?
Perfect
must I have slapped? must you have slapped? must she have slapped? must we have slapped? must you have slapped? must they have slapped?
V-ing perfect
must I have been slapping? must you have been slapping? must she have been slapping? must we have been slapping? must you have been slapping? must they have been slapping?
Interro-negative form
Simple form
must I not slap? must you not slap? must she not slap? must we not slap? must you not slap? must they not slap?
V-ing form
must I not be slapping? must you not be slapping? must she not be slapping? must we not be slapping? must you not be slapping? must they not be slapping?
Perfect
must I not have slapped? must you not have slapped? must she not have slapped? must we not have slapped? must you not have slapped? must they not have slapped?
V-ing perfect
must I not have been slapping? must you not have been slapping? must she not have been slapping? must we not have been slapping? must you not have been slapping? must they not have been slapping?