I must stall-feed you must stall-feed she 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 she 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 she 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 she 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 must not stall-feed you must not stall-feed she must not stall-feed we must not stall-feed you must not stall-feed they must not stall-feed
V-ing form
I must not be stall-feeding you must not be stall-feeding she must not be stall-feeding we must not be stall-feeding you must not be stall-feeding they must not be stall-feeding
Perfect
I must not have stall-fed you must not have stall-fed she must not have stall-fed we must not have stall-fed you must not have stall-fed they must not have stall-fed
V-ing perfect
I must not have been stall-feeding you must not have been stall-feeding she must not have been stall-feeding we must not have been stall-feeding you must not have been stall-feeding they must not have been stall-feeding
Interrogative form
Simple form
must I stall-feed? must you stall-feed? must she 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 she 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 she 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 she 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
must I not stall-feed? must you not stall-feed? must she not stall-feed? must we not stall-feed? must you not stall-feed? must they not stall-feed?
V-ing form
must I not be stall-feeding? must you not be stall-feeding? must she not be stall-feeding? must we not be stall-feeding? must you not be stall-feeding? must they not be stall-feeding?
Perfect
must I not have stall-fed? must you not have stall-fed? must she not have stall-fed? must we not have stall-fed? must you not have stall-fed? must they not have stall-fed?
V-ing perfect
must I not have been stall-feeding? must you not have been stall-feeding? must she not have been stall-feeding? must we not have been stall-feeding? must you not have been stall-feeding? must they not have been stall-feeding?