I must featheredge you must featheredge he must featheredge we must featheredge you must featheredge they must featheredge
V-ing form
I must be featheredging you must be featheredging he must be featheredging we must be featheredging you must be featheredging they must be featheredging
Perfect
I must have featheredged you must have featheredged he must have featheredged we must have featheredged you must have featheredged they must have featheredged
V-ing perfect
I must have been featheredging you must have been featheredging he must have been featheredging we must have been featheredging you must have been featheredging they must have been featheredging
Negation
Simple form
I must not featheredge you must not featheredge he must not featheredge we must not featheredge you must not featheredge they must not featheredge
V-ing form
I must not be featheredging you must not be featheredging he must not be featheredging we must not be featheredging you must not be featheredging they must not be featheredging
Perfect
I must not have featheredged you must not have featheredged he must not have featheredged we must not have featheredged you must not have featheredged they must not have featheredged
V-ing perfect
I must not have been featheredging you must not have been featheredging he must not have been featheredging we must not have been featheredging you must not have been featheredging they must not have been featheredging
Interrogative form
Simple form
must I featheredge? must you featheredge? must he featheredge? must we featheredge? must you featheredge? must they featheredge?
V-ing form
must I be featheredging? must you be featheredging? must he be featheredging? must we be featheredging? must you be featheredging? must they be featheredging?
Perfect
must I have featheredged? must you have featheredged? must he have featheredged? must we have featheredged? must you have featheredged? must they have featheredged?
V-ing perfect
must I have been featheredging? must you have been featheredging? must he have been featheredging? must we have been featheredging? must you have been featheredging? must they have been featheredging?
Interro-negative form
Simple form
must I not featheredge? must you not featheredge? must he not featheredge? must we not featheredge? must you not featheredge? must they not featheredge?
V-ing form
must I not be featheredging? must you not be featheredging? must he not be featheredging? must we not be featheredging? must you not be featheredging? must they not be featheredging?
Perfect
must I not have featheredged? must you not have featheredged? must he not have featheredged? must we not have featheredged? must you not have featheredged? must they not have featheredged?
V-ing perfect
must I not have been featheredging? must you not have been featheredging? must he not have been featheredging? must we not have been featheredging? must you not have been featheredging? must they not have been featheredging?