I must chat you must chat he must chat we must chat you must chat they must chat
Forma com V-ing
I must be chatting you must be chatting he must be chatting we must be chatting you must be chatting they must be chatting
Perfeito
I must have chatted you must have chatted he must have chatted we must have chatted you must have chatted they must have chatted
Perfeito com V-ing
I must have been chatting you must have been chatting he must have been chatting we must have been chatting you must have been chatting they must have been chatting
Negação
Forma simple
I must not chat you must not chat he must not chat we must not chat you must not chat they must not chat
Forma com V-ing
I must not be chatting you must not be chatting he must not be chatting we must not be chatting you must not be chatting they must not be chatting
Perfeito
I must not have chatted you must not have chatted he must not have chatted we must not have chatted you must not have chatted they must not have chatted
Perfeito com V-ing
I must not have been chatting you must not have been chatting he must not have been chatting we must not have been chatting you must not have been chatting they must not have been chatting
Forma interrogativa
Forma simple
must I chat? must you chat? must he chat? must we chat? must you chat? must they chat?
Forma com V-ing
must I be chatting? must you be chatting? must he be chatting? must we be chatting? must you be chatting? must they be chatting?
Perfeito
must I have chatted? must you have chatted? must he have chatted? must we have chatted? must you have chatted? must they have chatted?
Perfeito com V-ing
must I have been chatting? must you have been chatting? must he have been chatting? must we have been chatting? must you have been chatting? must they have been chatting?
Forma interro-Negação
Forma simple
must I not chat? must you not chat? must he not chat? must we not chat? must you not chat? must they not chat?
Forma com V-ing
must I not be chatting? must you not be chatting? must he not be chatting? must we not be chatting? must you not be chatting? must they not be chatting?
Perfeito
must I not have chatted? must you not have chatted? must he not have chatted? must we not have chatted? must you not have chatted? must they not have chatted?
Perfeito com V-ing
must I not have been chatting? must you not have been chatting? must he not have been chatting? must we not have been chatting? must you not have been chatting? must they not have been chatting?