I must detach you must detach he must detach we must detach you must detach they must detach
V-ing form
I must be detaching you must be detaching he must be detaching we must be detaching you must be detaching they must be detaching
Perfect
I must have detached you must have detached he must have detached we must have detached you must have detached they must have detached
V-ing perfect
I must have been detaching you must have been detaching he must have been detaching we must have been detaching you must have been detaching they must have been detaching
Negation
Simple form
I must not detach you must not detach he must not detach we must not detach you must not detach they must not detach
V-ing form
I must not be detaching you must not be detaching he must not be detaching we must not be detaching you must not be detaching they must not be detaching
Perfect
I must not have detached you must not have detached he must not have detached we must not have detached you must not have detached they must not have detached
V-ing perfect
I must not have been detaching you must not have been detaching he must not have been detaching we must not have been detaching you must not have been detaching they must not have been detaching
Interrogative form
Simple form
must I detach? must you detach? must he detach? must we detach? must you detach? must they detach?
V-ing form
must I be detaching? must you be detaching? must he be detaching? must we be detaching? must you be detaching? must they be detaching?
Perfect
must I have detached? must you have detached? must he have detached? must we have detached? must you have detached? must they have detached?
V-ing perfect
must I have been detaching? must you have been detaching? must he have been detaching? must we have been detaching? must you have been detaching? must they have been detaching?
Interro-negative form
Simple form
must I not detach? must you not detach? must he not detach? must we not detach? must you not detach? must they not detach?
V-ing form
must I not be detaching? must you not be detaching? must he not be detaching? must we not be detaching? must you not be detaching? must they not be detaching?
Perfect
must I not have detached? must you not have detached? must he not have detached? must we not have detached? must you not have detached? must they not have detached?
V-ing perfect
must I not have been detaching? must you not have been detaching? must he not have been detaching? must we not have been detaching? must you not have been detaching? must they not have been detaching?