Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I must turn in you must turn in he must turn in we must turn in you must turn in they must turn in
V-ing form
I must be turn ining you must be turn ining he must be turn ining we must be turn ining you must be turn ining they must be turn ining
Perfect
I must have turn ined you must have turn ined he must have turn ined we must have turn ined you must have turn ined they must have turn ined
V-ing perfect
I must have been turn ining you must have been turn ining he must have been turn ining we must have been turn ining you must have been turn ining they must have been turn ining
Negation
Simple form
I mustn't turn in you mustn't turn in he mustn't turn in we mustn't turn in you mustn't turn in they mustn't turn in
V-ing form
I mustn't be turn ining you mustn't be turn ining he mustn't be turn ining we mustn't be turn ining you mustn't be turn ining they mustn't be turn ining
Perfect
I mustn't have turn ined you mustn't have turn ined he mustn't have turn ined we mustn't have turn ined you mustn't have turn ined they mustn't have turn ined
V-ing perfect
I mustn't have been turn ining you mustn't have been turn ining he mustn't have been turn ining we mustn't have been turn ining you mustn't have been turn ining they mustn't have been turn ining
Interrogative form
Simple form
must I turn in? must you turn in? must he turn in? must we turn in? must you turn in? must they turn in?
V-ing form
must I be turn ining? must you be turn ining? must he be turn ining? must we be turn ining? must you be turn ining? must they be turn ining?
Perfect
must I have turn ined? must you have turn ined? must he have turn ined? must we have turn ined? must you have turn ined? must they have turn ined?
V-ing perfect
must I have been turn ining? must you have been turn ining? must he have been turn ining? must we have been turn ining? must you have been turn ining? must they have been turn ining?
Interro-negative form
Simple form
mustn't I turn in? mustn't you turn in? mustn't he turn in? mustn't we turn in? mustn't you turn in? mustn't they turn in?
V-ing form
mustn't I be turn ining? mustn't you be turn ining? mustn't he be turn ining? mustn't we be turn ining? mustn't you be turn ining? mustn't they be turn ining?
Perfect
mustn't I have turn ined? mustn't you have turn ined? mustn't he have turn ined? mustn't we have turn ined? mustn't you have turn ined? mustn't they have turn ined?
V-ing perfect
mustn't I have been turn ining? mustn't you have been turn ining? mustn't he have been turn ining? mustn't we have been turn ining? mustn't you have been turn ining? mustn't they have been turn ining?