English verb conjugation
MUST HERD

Regular verb: herd - herded - herded

Affirmation

Simple form	V-ing form
I must herd you must herd he must herd we must herd you must herd they must herd	I must be herding you must be herding he must be herding we must be herding you must be herding they must be herding
Perfect	V-ing perfect
I must have herded you must have herded he must have herded we must have herded you must have herded they must have herded	I must have been herding you must have been herding he must have been herding we must have been herding you must have been herding they must have been herding

Negation

Simple form	V-ing form
I mustn't herd you mustn't herd he mustn't herd we mustn't herd you mustn't herd they mustn't herd	I mustn't be herding you mustn't be herding he mustn't be herding we mustn't be herding you mustn't be herding they mustn't be herding
Perfect	V-ing perfect
I mustn't have herded you mustn't have herded he mustn't have herded we mustn't have herded you mustn't have herded they mustn't have herded	I mustn't have been herding you mustn't have been herding he mustn't have been herding we mustn't have been herding you mustn't have been herding they mustn't have been herding

Interrogative form

Simple form	V-ing form
must I herd? must you herd? must he herd? must we herd? must you herd? must they herd?	must I be herding? must you be herding? must he be herding? must we be herding? must you be herding? must they be herding?
Perfect	V-ing perfect
must I have herded? must you have herded? must he have herded? must we have herded? must you have herded? must they have herded?	must I have been herding? must you have been herding? must he have been herding? must we have been herding? must you have been herding? must they have been herding?

Interro-negative form

Simple form	V-ing form
mustn't I herd? mustn't you herd? mustn't he herd? mustn't we herd? mustn't you herd? mustn't they herd?	mustn't I be herding? mustn't you be herding? mustn't he be herding? mustn't we be herding? mustn't you be herding? mustn't they be herding?
Perfect	V-ing perfect
mustn't I have herded? mustn't you have herded? mustn't he have herded? mustn't we have herded? mustn't you have herded? mustn't they have herded?	mustn't I have been herding? mustn't you have been herding? mustn't he have been herding? mustn't we have been herding? mustn't you have been herding? mustn't they have been herding?