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