I must rummage you must rummage he must rummage we must rummage you must rummage they must rummage
V-ing form
I must be rummaging you must be rummaging he must be rummaging we must be rummaging you must be rummaging they must be rummaging
Perfect
I must have rummaged you must have rummaged he must have rummaged we must have rummaged you must have rummaged they must have rummaged
V-ing perfect
I must have been rummaging you must have been rummaging he must have been rummaging we must have been rummaging you must have been rummaging they must have been rummaging
Negation
Simple form
I mustn't rummage you mustn't rummage he mustn't rummage we mustn't rummage you mustn't rummage they mustn't rummage
V-ing form
I mustn't be rummaging you mustn't be rummaging he mustn't be rummaging we mustn't be rummaging you mustn't be rummaging they mustn't be rummaging
Perfect
I mustn't have rummaged you mustn't have rummaged he mustn't have rummaged we mustn't have rummaged you mustn't have rummaged they mustn't have rummaged
V-ing perfect
I mustn't have been rummaging you mustn't have been rummaging he mustn't have been rummaging we mustn't have been rummaging you mustn't have been rummaging they mustn't have been rummaging
Interrogative form
Simple form
must I rummage? must you rummage? must he rummage? must we rummage? must you rummage? must they rummage?
V-ing form
must I be rummaging? must you be rummaging? must he be rummaging? must we be rummaging? must you be rummaging? must they be rummaging?
Perfect
must I have rummaged? must you have rummaged? must he have rummaged? must we have rummaged? must you have rummaged? must they have rummaged?
V-ing perfect
must I have been rummaging? must you have been rummaging? must he have been rummaging? must we have been rummaging? must you have been rummaging? must they have been rummaging?
Interro-negative form
Simple form
mustn't I rummage? mustn't you rummage? mustn't he rummage? mustn't we rummage? mustn't you rummage? mustn't they rummage?
V-ing form
mustn't I be rummaging? mustn't you be rummaging? mustn't he be rummaging? mustn't we be rummaging? mustn't you be rummaging? mustn't they be rummaging?
Perfect
mustn't I have rummaged? mustn't you have rummaged? mustn't he have rummaged? mustn't we have rummaged? mustn't you have rummaged? mustn't they have rummaged?
V-ing perfect
mustn't I have been rummaging? mustn't you have been rummaging? mustn't he have been rummaging? mustn't we have been rummaging? mustn't you have been rummaging? mustn't they have been rummaging?