I must answer you must answer he must answer we must answer you must answer they must answer
Forma com V-ing
I must be answering you must be answering he must be answering we must be answering you must be answering they must be answering
Perfeito
I must have answered you must have answered he must have answered we must have answered you must have answered they must have answered
Perfeito com V-ing
I must have been answering you must have been answering he must have been answering we must have been answering you must have been answering they must have been answering
Negação
Forma simple
I mustn't answer you mustn't answer he mustn't answer we mustn't answer you mustn't answer they mustn't answer
Forma com V-ing
I mustn't be answering you mustn't be answering he mustn't be answering we mustn't be answering you mustn't be answering they mustn't be answering
Perfeito
I mustn't have answered you mustn't have answered he mustn't have answered we mustn't have answered you mustn't have answered they mustn't have answered
Perfeito com V-ing
I mustn't have been answering you mustn't have been answering he mustn't have been answering we mustn't have been answering you mustn't have been answering they mustn't have been answering
Forma interrogativa
Forma simple
must I answer? must you answer? must he answer? must we answer? must you answer? must they answer?
Forma com V-ing
must I be answering? must you be answering? must he be answering? must we be answering? must you be answering? must they be answering?
Perfeito
must I have answered? must you have answered? must he have answered? must we have answered? must you have answered? must they have answered?
Perfeito com V-ing
must I have been answering? must you have been answering? must he have been answering? must we have been answering? must you have been answering? must they have been answering?
Forma interro-Negação
Forma simple
mustn't I answer? mustn't you answer? mustn't he answer? mustn't we answer? mustn't you answer? mustn't they answer?
Forma com V-ing
mustn't I be answering? mustn't you be answering? mustn't he be answering? mustn't we be answering? mustn't you be answering? mustn't they be answering?
Perfeito
mustn't I have answered? mustn't you have answered? mustn't he have answered? mustn't we have answered? mustn't you have answered? mustn't they have answered?
Perfeito com V-ing
mustn't I have been answering? mustn't you have been answering? mustn't he have been answering? mustn't we have been answering? mustn't you have been answering? mustn't they have been answering?