I must prod you must prod he must prod we must prod you must prod they must prod
V-ing form
I must be prodding you must be prodding he must be prodding we must be prodding you must be prodding they must be prodding
Perfect
I must have prodded you must have prodded he must have prodded we must have prodded you must have prodded they must have prodded
V-ing perfect
I must have been prodding you must have been prodding he must have been prodding we must have been prodding you must have been prodding they must have been prodding
Negation
Simple form
I must not prod you must not prod he must not prod we must not prod you must not prod they must not prod
V-ing form
I must not be prodding you must not be prodding he must not be prodding we must not be prodding you must not be prodding they must not be prodding
Perfect
I must not have prodded you must not have prodded he must not have prodded we must not have prodded you must not have prodded they must not have prodded
V-ing perfect
I must not have been prodding you must not have been prodding he must not have been prodding we must not have been prodding you must not have been prodding they must not have been prodding
Interrogative form
Simple form
must I prod? must you prod? must he prod? must we prod? must you prod? must they prod?
V-ing form
must I be prodding? must you be prodding? must he be prodding? must we be prodding? must you be prodding? must they be prodding?
Perfect
must I have prodded? must you have prodded? must he have prodded? must we have prodded? must you have prodded? must they have prodded?
V-ing perfect
must I have been prodding? must you have been prodding? must he have been prodding? must we have been prodding? must you have been prodding? must they have been prodding?
Interro-negative form
Simple form
must I not prod? must you not prod? must he not prod? must we not prod? must you not prod? must they not prod?
V-ing form
must I not be prodding? must you not be prodding? must he not be prodding? must we not be prodding? must you not be prodding? must they not be prodding?
Perfect
must I not have prodded? must you not have prodded? must he not have prodded? must we not have prodded? must you not have prodded? must they not have prodded?
V-ing perfect
must I not have been prodding? must you not have been prodding? must he not have been prodding? must we not have been prodding? must you not have been prodding? must they not have been prodding?