I must forage you must forage she must forage we must forage you must forage they must forage
V-ing form
I must be foraging you must be foraging she must be foraging we must be foraging you must be foraging they must be foraging
Perfect
I must have foraged you must have foraged she must have foraged we must have foraged you must have foraged they must have foraged
V-ing perfect
I must have been foraging you must have been foraging she must have been foraging we must have been foraging you must have been foraging they must have been foraging
Negation
Simple form
I must not forage you must not forage she must not forage we must not forage you must not forage they must not forage
V-ing form
I must not be foraging you must not be foraging she must not be foraging we must not be foraging you must not be foraging they must not be foraging
Perfect
I must not have foraged you must not have foraged she must not have foraged we must not have foraged you must not have foraged they must not have foraged
V-ing perfect
I must not have been foraging you must not have been foraging she must not have been foraging we must not have been foraging you must not have been foraging they must not have been foraging
Interrogative form
Simple form
must I forage? must you forage? must she forage? must we forage? must you forage? must they forage?
V-ing form
must I be foraging? must you be foraging? must she be foraging? must we be foraging? must you be foraging? must they be foraging?
Perfect
must I have foraged? must you have foraged? must she have foraged? must we have foraged? must you have foraged? must they have foraged?
V-ing perfect
must I have been foraging? must you have been foraging? must she have been foraging? must we have been foraging? must you have been foraging? must they have been foraging?
Interro-negative form
Simple form
must I not forage? must you not forage? must she not forage? must we not forage? must you not forage? must they not forage?
V-ing form
must I not be foraging? must you not be foraging? must she not be foraging? must we not be foraging? must you not be foraging? must they not be foraging?
Perfect
must I not have foraged? must you not have foraged? must she not have foraged? must we not have foraged? must you not have foraged? must they not have foraged?
V-ing perfect
must I not have been foraging? must you not have been foraging? must she not have been foraging? must we not have been foraging? must you not have been foraging? must they not have been foraging?