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