I must gird you must gird he must gird we must gird you must gird they must gird
V-ing form
I must be girding you must be girding he must be girding we must be girding you must be girding they must be girding
Perfect
I must have girt, girded you must have girt, girded he must have girt, girded we must have girt, girded you must have girt, girded they must have girt, girded
V-ing perfect
I must have been girding you must have been girding he must have been girding we must have been girding you must have been girding they must have been girding
Negation
Simple form
I must not gird you must not gird he must not gird we must not gird you must not gird they must not gird
V-ing form
I must not be girding you must not be girding he must not be girding we must not be girding you must not be girding they must not be girding
Perfect
I must not have girt, girded you must not have girt, girded he must not have girt, girded we must not have girt, girded you must not have girt, girded they must not have girt, girded
V-ing perfect
I must not have been girding you must not have been girding he must not have been girding we must not have been girding you must not have been girding they must not have been girding
Interrogative form
Simple form
must I gird? must you gird? must he gird? must we gird? must you gird? must they gird?
V-ing form
must I be girding? must you be girding? must he be girding? must we be girding? must you be girding? must they be girding?
Perfect
must I have girt, girded? must you have girt, girded? must he have girt, girded? must we have girt, girded? must you have girt, girded? must they have girt, girded?
V-ing perfect
must I have been girding? must you have been girding? must he have been girding? must we have been girding? must you have been girding? must they have been girding?
Interro-negative form
Simple form
must I not gird? must you not gird? must he not gird? must we not gird? must you not gird? must they not gird?
V-ing form
must I not be girding? must you not be girding? must he not be girding? must we not be girding? must you not be girding? must they not be girding?
Perfect
must I not have girt, girded? must you not have girt, girded? must he not have girt, girded? must we not have girt, girded? must you not have girt, girded? must they not have girt, girded?
V-ing perfect
must I not have been girding? must you not have been girding? must he not have been girding? must we not have been girding? must you not have been girding? must they not have been girding?