I must cane you must cane she must cane we must cane you must cane they must cane
V-ing form
I must be caning you must be caning she must be caning we must be caning you must be caning they must be caning
Perfect
I must have caned you must have caned she 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 she 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 she 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 she 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 she 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 she 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 she cane? must we cane? must you cane? must they cane?
V-ing form
must I be caning? must you be caning? must she be caning? must we be caning? must you be caning? must they be caning?
Perfect
must I have caned? must you have caned? must she 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 she 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 she 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 she 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 she 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 she have been caning? mustn't we have been caning? mustn't you have been caning? mustn't they have been caning?