I must stall-feed you must stall-feed he must stall-feed we must stall-feed you must stall-feed they must stall-feed
V-ing form
I must be stall-feeding you must be stall-feeding he must be stall-feeding we must be stall-feeding you must be stall-feeding they must be stall-feeding
Perfect
I must have stall-fed you must have stall-fed he must have stall-fed we must have stall-fed you must have stall-fed they must have stall-fed
V-ing perfect
I must have been stall-feeding you must have been stall-feeding he must have been stall-feeding we must have been stall-feeding you must have been stall-feeding they must have been stall-feeding
Negation
Simple form
I mustn't stall-feed you mustn't stall-feed he mustn't stall-feed we mustn't stall-feed you mustn't stall-feed they mustn't stall-feed
V-ing form
I mustn't be stall-feeding you mustn't be stall-feeding he mustn't be stall-feeding we mustn't be stall-feeding you mustn't be stall-feeding they mustn't be stall-feeding
Perfect
I mustn't have stall-fed you mustn't have stall-fed he mustn't have stall-fed we mustn't have stall-fed you mustn't have stall-fed they mustn't have stall-fed
V-ing perfect
I mustn't have been stall-feeding you mustn't have been stall-feeding he mustn't have been stall-feeding we mustn't have been stall-feeding you mustn't have been stall-feeding they mustn't have been stall-feeding
Interrogative form
Simple form
must I stall-feed? must you stall-feed? must he stall-feed? must we stall-feed? must you stall-feed? must they stall-feed?
V-ing form
must I be stall-feeding? must you be stall-feeding? must he be stall-feeding? must we be stall-feeding? must you be stall-feeding? must they be stall-feeding?
Perfect
must I have stall-fed? must you have stall-fed? must he have stall-fed? must we have stall-fed? must you have stall-fed? must they have stall-fed?
V-ing perfect
must I have been stall-feeding? must you have been stall-feeding? must he have been stall-feeding? must we have been stall-feeding? must you have been stall-feeding? must they have been stall-feeding?
Interro-negative form
Simple form
mustn't I stall-feed? mustn't you stall-feed? mustn't he stall-feed? mustn't we stall-feed? mustn't you stall-feed? mustn't they stall-feed?
V-ing form
mustn't I be stall-feeding? mustn't you be stall-feeding? mustn't he be stall-feeding? mustn't we be stall-feeding? mustn't you be stall-feeding? mustn't they be stall-feeding?
Perfect
mustn't I have stall-fed? mustn't you have stall-fed? mustn't he have stall-fed? mustn't we have stall-fed? mustn't you have stall-fed? mustn't they have stall-fed?
V-ing perfect
mustn't I have been stall-feeding? mustn't you have been stall-feeding? mustn't he have been stall-feeding? mustn't we have been stall-feeding? mustn't you have been stall-feeding? mustn't they have been stall-feeding?