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