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