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 mustn't foregather you mustn't foregather he mustn't foregather we mustn't foregather you mustn't foregather they mustn't foregather
V-ing form
I mustn't be foregathering you mustn't be foregathering he mustn't be foregathering we mustn't be foregathering you mustn't be foregathering they mustn't be foregathering
Perfect
I mustn't have foregathered you mustn't have foregathered he mustn't have foregathered we mustn't have foregathered you mustn't have foregathered they mustn't have foregathered
V-ing perfect
I mustn't have been foregathering you mustn't have been foregathering he mustn't have been foregathering we mustn't have been foregathering you mustn't have been foregathering they mustn't 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
mustn't I foregather? mustn't you foregather? mustn't he foregather? mustn't we foregather? mustn't you foregather? mustn't they foregather?
V-ing form
mustn't I be foregathering? mustn't you be foregathering? mustn't he be foregathering? mustn't we be foregathering? mustn't you be foregathering? mustn't they be foregathering?
Perfect
mustn't I have foregathered? mustn't you have foregathered? mustn't he have foregathered? mustn't we have foregathered? mustn't you have foregathered? mustn't they have foregathered?
V-ing perfect
mustn't I have been foregathering? mustn't you have been foregathering? mustn't he have been foregathering? mustn't we have been foregathering? mustn't you have been foregathering? mustn't they have been foregathering?