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 must not confine you must not confine he must not confine we must not confine you must not confine they must not confine
V-ing form
I must not be confining you must not be confining he must not be confining we must not be confining you must not be confining they must not be confining
Perfect
I must not have confined you must not have confined he must not have confined we must not have confined you must not have confined they must not have confined
V-ing perfect
I must not have been confining you must not have been confining he must not have been confining we must not have been confining you must not have been confining they must not 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
must I not confine? must you not confine? must he not confine? must we not confine? must you not confine? must they not confine?
V-ing form
must I not be confining? must you not be confining? must he not be confining? must we not be confining? must you not be confining? must they not be confining?
Perfect
must I not have confined? must you not have confined? must he not have confined? must we not have confined? must you not have confined? must they not have confined?
V-ing perfect
must I not have been confining? must you not have been confining? must he not have been confining? must we not have been confining? must you not have been confining? must they not have been confining?