I must unbutton you must unbutton she must unbutton we must unbutton you must unbutton they must unbutton
Forma com V-ing
I must be unbuttoning you must be unbuttoning she must be unbuttoning we must be unbuttoning you must be unbuttoning they must be unbuttoning
Perfeito
I must have unbuttoned you must have unbuttoned she must have unbuttoned we must have unbuttoned you must have unbuttoned they must have unbuttoned
Perfeito com V-ing
I must have been unbuttoning you must have been unbuttoning she must have been unbuttoning we must have been unbuttoning you must have been unbuttoning they must have been unbuttoning
Negação
Forma simple
I must not unbutton you must not unbutton she must not unbutton we must not unbutton you must not unbutton they must not unbutton
Forma com V-ing
I must not be unbuttoning you must not be unbuttoning she must not be unbuttoning we must not be unbuttoning you must not be unbuttoning they must not be unbuttoning
Perfeito
I must not have unbuttoned you must not have unbuttoned she must not have unbuttoned we must not have unbuttoned you must not have unbuttoned they must not have unbuttoned
Perfeito com V-ing
I must not have been unbuttoning you must not have been unbuttoning she must not have been unbuttoning we must not have been unbuttoning you must not have been unbuttoning they must not have been unbuttoning
Forma interrogativa
Forma simple
must I unbutton? must you unbutton? must she unbutton? must we unbutton? must you unbutton? must they unbutton?
Forma com V-ing
must I be unbuttoning? must you be unbuttoning? must she be unbuttoning? must we be unbuttoning? must you be unbuttoning? must they be unbuttoning?
Perfeito
must I have unbuttoned? must you have unbuttoned? must she have unbuttoned? must we have unbuttoned? must you have unbuttoned? must they have unbuttoned?
Perfeito com V-ing
must I have been unbuttoning? must you have been unbuttoning? must she have been unbuttoning? must we have been unbuttoning? must you have been unbuttoning? must they have been unbuttoning?
Forma interro-Negação
Forma simple
must I not unbutton? must you not unbutton? must she not unbutton? must we not unbutton? must you not unbutton? must they not unbutton?
Forma com V-ing
must I not be unbuttoning? must you not be unbuttoning? must she not be unbuttoning? must we not be unbuttoning? must you not be unbuttoning? must they not be unbuttoning?
Perfeito
must I not have unbuttoned? must you not have unbuttoned? must she not have unbuttoned? must we not have unbuttoned? must you not have unbuttoned? must they not have unbuttoned?
Perfeito com V-ing
must I not have been unbuttoning? must you not have been unbuttoning? must she not have been unbuttoning? must we not have been unbuttoning? must you not have been unbuttoning? must they not have been unbuttoning?