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