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