I must shepherd you must shepherd he must shepherd we must shepherd you must shepherd they must shepherd
V-ing form
I must be shepherding you must be shepherding he must be shepherding we must be shepherding you must be shepherding they must be shepherding
Perfect
I must have shepherded you must have shepherded he must have shepherded we must have shepherded you must have shepherded they must have shepherded
V-ing perfect
I must have been shepherding you must have been shepherding he must have been shepherding we must have been shepherding you must have been shepherding they must have been shepherding
Negation
Simple form
I mustn't shepherd you mustn't shepherd he mustn't shepherd we mustn't shepherd you mustn't shepherd they mustn't shepherd
V-ing form
I mustn't be shepherding you mustn't be shepherding he mustn't be shepherding we mustn't be shepherding you mustn't be shepherding they mustn't be shepherding
Perfect
I mustn't have shepherded you mustn't have shepherded he mustn't have shepherded we mustn't have shepherded you mustn't have shepherded they mustn't have shepherded
V-ing perfect
I mustn't have been shepherding you mustn't have been shepherding he mustn't have been shepherding we mustn't have been shepherding you mustn't have been shepherding they mustn't have been shepherding
Interrogative form
Simple form
must I shepherd? must you shepherd? must he shepherd? must we shepherd? must you shepherd? must they shepherd?
V-ing form
must I be shepherding? must you be shepherding? must he be shepherding? must we be shepherding? must you be shepherding? must they be shepherding?
Perfect
must I have shepherded? must you have shepherded? must he have shepherded? must we have shepherded? must you have shepherded? must they have shepherded?
V-ing perfect
must I have been shepherding? must you have been shepherding? must he have been shepherding? must we have been shepherding? must you have been shepherding? must they have been shepherding?
Interro-negative form
Simple form
mustn't I shepherd? mustn't you shepherd? mustn't he shepherd? mustn't we shepherd? mustn't you shepherd? mustn't they shepherd?
V-ing form
mustn't I be shepherding? mustn't you be shepherding? mustn't he be shepherding? mustn't we be shepherding? mustn't you be shepherding? mustn't they be shepherding?
Perfect
mustn't I have shepherded? mustn't you have shepherded? mustn't he have shepherded? mustn't we have shepherded? mustn't you have shepherded? mustn't they have shepherded?
V-ing perfect
mustn't I have been shepherding? mustn't you have been shepherding? mustn't he have been shepherding? mustn't we have been shepherding? mustn't you have been shepherding? mustn't they have been shepherding?