I must uncase you must uncase she must uncase we must uncase you must uncase they must uncase
V-ing form
I must be uncasing you must be uncasing she must be uncasing we must be uncasing you must be uncasing they must be uncasing
Perfect
I must have uncased you must have uncased she must have uncased we must have uncased you must have uncased they must have uncased
V-ing perfect
I must have been uncasing you must have been uncasing she must have been uncasing we must have been uncasing you must have been uncasing they must have been uncasing
Negation
Simple form
I must not uncase you must not uncase she must not uncase we must not uncase you must not uncase they must not uncase
V-ing form
I must not be uncasing you must not be uncasing she must not be uncasing we must not be uncasing you must not be uncasing they must not be uncasing
Perfect
I must not have uncased you must not have uncased she must not have uncased we must not have uncased you must not have uncased they must not have uncased
V-ing perfect
I must not have been uncasing you must not have been uncasing she must not have been uncasing we must not have been uncasing you must not have been uncasing they must not have been uncasing
Interrogative form
Simple form
must I uncase? must you uncase? must she uncase? must we uncase? must you uncase? must they uncase?
V-ing form
must I be uncasing? must you be uncasing? must she be uncasing? must we be uncasing? must you be uncasing? must they be uncasing?
Perfect
must I have uncased? must you have uncased? must she have uncased? must we have uncased? must you have uncased? must they have uncased?
V-ing perfect
must I have been uncasing? must you have been uncasing? must she have been uncasing? must we have been uncasing? must you have been uncasing? must they have been uncasing?
Interro-negative form
Simple form
must I not uncase? must you not uncase? must she not uncase? must we not uncase? must you not uncase? must they not uncase?
V-ing form
must I not be uncasing? must you not be uncasing? must she not be uncasing? must we not be uncasing? must you not be uncasing? must they not be uncasing?
Perfect
must I not have uncased? must you not have uncased? must she not have uncased? must we not have uncased? must you not have uncased? must they not have uncased?
V-ing perfect
must I not have been uncasing? must you not have been uncasing? must she not have been uncasing? must we not have been uncasing? must you not have been uncasing? must they not have been uncasing?