I must structure you must structure she must structure we must structure you must structure they must structure
V-ing form
I must be structuring you must be structuring she must be structuring we must be structuring you must be structuring they must be structuring
Perfect
I must have structured you must have structured she must have structured we must have structured you must have structured they must have structured
V-ing perfect
I must have been structuring you must have been structuring she must have been structuring we must have been structuring you must have been structuring they must have been structuring
Negation
Simple form
I must not structure you must not structure she must not structure we must not structure you must not structure they must not structure
V-ing form
I must not be structuring you must not be structuring she must not be structuring we must not be structuring you must not be structuring they must not be structuring
Perfect
I must not have structured you must not have structured she must not have structured we must not have structured you must not have structured they must not have structured
V-ing perfect
I must not have been structuring you must not have been structuring she must not have been structuring we must not have been structuring you must not have been structuring they must not have been structuring
Interrogative form
Simple form
must I structure? must you structure? must she structure? must we structure? must you structure? must they structure?
V-ing form
must I be structuring? must you be structuring? must she be structuring? must we be structuring? must you be structuring? must they be structuring?
Perfect
must I have structured? must you have structured? must she have structured? must we have structured? must you have structured? must they have structured?
V-ing perfect
must I have been structuring? must you have been structuring? must she have been structuring? must we have been structuring? must you have been structuring? must they have been structuring?
Interro-negative form
Simple form
must I not structure? must you not structure? must she not structure? must we not structure? must you not structure? must they not structure?
V-ing form
must I not be structuring? must you not be structuring? must she not be structuring? must we not be structuring? must you not be structuring? must they not be structuring?
Perfect
must I not have structured? must you not have structured? must she not have structured? must we not have structured? must you not have structured? must they not have structured?
V-ing perfect
must I not have been structuring? must you not have been structuring? must she not have been structuring? must we not have been structuring? must you not have been structuring? must they not have been structuring?