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