I must scaffold you must scaffold she must scaffold we must scaffold you must scaffold they must scaffold
V-ing form
I must be scaffolding you must be scaffolding she must be scaffolding we must be scaffolding you must be scaffolding they must be scaffolding
Perfect
I must have scaffolded you must have scaffolded she must have scaffolded we must have scaffolded you must have scaffolded they must have scaffolded
V-ing perfect
I must have been scaffolding you must have been scaffolding she must have been scaffolding we must have been scaffolding you must have been scaffolding they must have been scaffolding
Negation
Simple form
I must not scaffold you must not scaffold she must not scaffold we must not scaffold you must not scaffold they must not scaffold
V-ing form
I must not be scaffolding you must not be scaffolding she must not be scaffolding we must not be scaffolding you must not be scaffolding they must not be scaffolding
Perfect
I must not have scaffolded you must not have scaffolded she must not have scaffolded we must not have scaffolded you must not have scaffolded they must not have scaffolded
V-ing perfect
I must not have been scaffolding you must not have been scaffolding she must not have been scaffolding we must not have been scaffolding you must not have been scaffolding they must not have been scaffolding
Interrogative form
Simple form
must I scaffold? must you scaffold? must she scaffold? must we scaffold? must you scaffold? must they scaffold?
V-ing form
must I be scaffolding? must you be scaffolding? must she be scaffolding? must we be scaffolding? must you be scaffolding? must they be scaffolding?
Perfect
must I have scaffolded? must you have scaffolded? must she have scaffolded? must we have scaffolded? must you have scaffolded? must they have scaffolded?
V-ing perfect
must I have been scaffolding? must you have been scaffolding? must she have been scaffolding? must we have been scaffolding? must you have been scaffolding? must they have been scaffolding?
Interro-negative form
Simple form
must I not scaffold? must you not scaffold? must she not scaffold? must we not scaffold? must you not scaffold? must they not scaffold?
V-ing form
must I not be scaffolding? must you not be scaffolding? must she not be scaffolding? must we not be scaffolding? must you not be scaffolding? must they not be scaffolding?
Perfect
must I not have scaffolded? must you not have scaffolded? must she not have scaffolded? must we not have scaffolded? must you not have scaffolded? must they not have scaffolded?
V-ing perfect
must I not have been scaffolding? must you not have been scaffolding? must she not have been scaffolding? must we not have been scaffolding? must you not have been scaffolding? must they not have been scaffolding?