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