I must sign you must sign he must sign we must sign you must sign they must sign
Forma com V-ing
I must be signing you must be signing he must be signing we must be signing you must be signing they must be signing
Perfeito
I must have signed you must have signed he must have signed we must have signed you must have signed they must have signed
Perfeito com V-ing
I must have been signing you must have been signing he must have been signing we must have been signing you must have been signing they must have been signing
Negação
Forma simple
I must not sign you must not sign he must not sign we must not sign you must not sign they must not sign
Forma com V-ing
I must not be signing you must not be signing he must not be signing we must not be signing you must not be signing they must not be signing
Perfeito
I must not have signed you must not have signed he must not have signed we must not have signed you must not have signed they must not have signed
Perfeito com V-ing
I must not have been signing you must not have been signing he must not have been signing we must not have been signing you must not have been signing they must not have been signing
Forma interrogativa
Forma simple
must I sign? must you sign? must he sign? must we sign? must you sign? must they sign?
Forma com V-ing
must I be signing? must you be signing? must he be signing? must we be signing? must you be signing? must they be signing?
Perfeito
must I have signed? must you have signed? must he have signed? must we have signed? must you have signed? must they have signed?
Perfeito com V-ing
must I have been signing? must you have been signing? must he have been signing? must we have been signing? must you have been signing? must they have been signing?
Forma interro-Negação
Forma simple
must I not sign? must you not sign? must he not sign? must we not sign? must you not sign? must they not sign?
Forma com V-ing
must I not be signing? must you not be signing? must he not be signing? must we not be signing? must you not be signing? must they not be signing?
Perfeito
must I not have signed? must you not have signed? must he not have signed? must we not have signed? must you not have signed? must they not have signed?
Perfeito com V-ing
must I not have been signing? must you not have been signing? must he not have been signing? must we not have been signing? must you not have been signing? must they not have been signing?