I must enable you must enable he must enable we must enable you must enable they must enable
V-ing form
I must be enabling you must be enabling he must be enabling we must be enabling you must be enabling they must be enabling
Perfect
I must have enabled you must have enabled he must have enabled we must have enabled you must have enabled they must have enabled
V-ing perfect
I must have been enabling you must have been enabling he must have been enabling we must have been enabling you must have been enabling they must have been enabling
Negation
Simple form
I must not enable you must not enable he must not enable we must not enable you must not enable they must not enable
V-ing form
I must not be enabling you must not be enabling he must not be enabling we must not be enabling you must not be enabling they must not be enabling
Perfect
I must not have enabled you must not have enabled he must not have enabled we must not have enabled you must not have enabled they must not have enabled
V-ing perfect
I must not have been enabling you must not have been enabling he must not have been enabling we must not have been enabling you must not have been enabling they must not have been enabling
Interrogative form
Simple form
must I enable? must you enable? must he enable? must we enable? must you enable? must they enable?
V-ing form
must I be enabling? must you be enabling? must he be enabling? must we be enabling? must you be enabling? must they be enabling?
Perfect
must I have enabled? must you have enabled? must he have enabled? must we have enabled? must you have enabled? must they have enabled?
V-ing perfect
must I have been enabling? must you have been enabling? must he have been enabling? must we have been enabling? must you have been enabling? must they have been enabling?
Interro-negative form
Simple form
must I not enable? must you not enable? must he not enable? must we not enable? must you not enable? must they not enable?
V-ing form
must I not be enabling? must you not be enabling? must he not be enabling? must we not be enabling? must you not be enabling? must they not be enabling?
Perfect
must I not have enabled? must you not have enabled? must he not have enabled? must we not have enabled? must you not have enabled? must they not have enabled?
V-ing perfect
must I not have been enabling? must you not have been enabling? must he not have been enabling? must we not have been enabling? must you not have been enabling? must they not have been enabling?