I must foregather you must foregather he must foregather we must foregather you must foregather they must foregather
V-ing form
I must be foregathering you must be foregathering he must be foregathering we must be foregathering you must be foregathering they must be foregathering
Perfect
I must have foregathered you must have foregathered he must have foregathered we must have foregathered you must have foregathered they must have foregathered
V-ing perfect
I must have been foregathering you must have been foregathering he must have been foregathering we must have been foregathering you must have been foregathering they must have been foregathering
Negation
Simple form
I must not foregather you must not foregather he must not foregather we must not foregather you must not foregather they must not foregather
V-ing form
I must not be foregathering you must not be foregathering he must not be foregathering we must not be foregathering you must not be foregathering they must not be foregathering
Perfect
I must not have foregathered you must not have foregathered he must not have foregathered we must not have foregathered you must not have foregathered they must not have foregathered
V-ing perfect
I must not have been foregathering you must not have been foregathering he must not have been foregathering we must not have been foregathering you must not have been foregathering they must not have been foregathering
Interrogative form
Simple form
must I foregather? must you foregather? must he foregather? must we foregather? must you foregather? must they foregather?
V-ing form
must I be foregathering? must you be foregathering? must he be foregathering? must we be foregathering? must you be foregathering? must they be foregathering?
Perfect
must I have foregathered? must you have foregathered? must he have foregathered? must we have foregathered? must you have foregathered? must they have foregathered?
V-ing perfect
must I have been foregathering? must you have been foregathering? must he have been foregathering? must we have been foregathering? must you have been foregathering? must they have been foregathering?
Interro-negative form
Simple form
must I not foregather? must you not foregather? must he not foregather? must we not foregather? must you not foregather? must they not foregather?
V-ing form
must I not be foregathering? must you not be foregathering? must he not be foregathering? must we not be foregathering? must you not be foregathering? must they not be foregathering?
Perfect
must I not have foregathered? must you not have foregathered? must he not have foregathered? must we not have foregathered? must you not have foregathered? must they not have foregathered?
V-ing perfect
must I not have been foregathering? must you not have been foregathering? must he not have been foregathering? must we not have been foregathering? must you not have been foregathering? must they not have been foregathering?