I can unbutton you can unbutton he can unbutton we can unbutton you can unbutton they can unbutton
Forma com V-ing
I can be unbuttoning you can be unbuttoning he can be unbuttoning we can be unbuttoning you can be unbuttoning they can be unbuttoning
Perfeito
I can have unbuttoned you can have unbuttoned he can have unbuttoned we can have unbuttoned you can have unbuttoned they can have unbuttoned
Perfeito com V-ing
I can have been unbuttoning you can have been unbuttoning he can have been unbuttoning we can have been unbuttoning you can have been unbuttoning they can have been unbuttoning
Negação
Forma simple
I can't unbutton you can't unbutton he can't unbutton we can't unbutton you can't unbutton they can't unbutton
Forma com V-ing
I can't be unbuttoning you can't be unbuttoning he can't be unbuttoning we can't be unbuttoning you can't be unbuttoning they can't be unbuttoning
Perfeito
I can't have unbuttoned you can't have unbuttoned he can't have unbuttoned we can't have unbuttoned you can't have unbuttoned they can't have unbuttoned
Perfeito com V-ing
I can't have been unbuttoning you can't have been unbuttoning he can't have been unbuttoning we can't have been unbuttoning you can't have been unbuttoning they can't have been unbuttoning
Forma interrogativa
Forma simple
can I unbutton? can you unbutton? can he unbutton? can we unbutton? can you unbutton? can they unbutton?
Forma com V-ing
can I be unbuttoning? can you be unbuttoning? can he be unbuttoning? can we be unbuttoning? can you be unbuttoning? can they be unbuttoning?
Perfeito
can I have unbuttoned? can you have unbuttoned? can he have unbuttoned? can we have unbuttoned? can you have unbuttoned? can they have unbuttoned?
Perfeito com V-ing
can I have been unbuttoning? can you have been unbuttoning? can he have been unbuttoning? can we have been unbuttoning? can you have been unbuttoning? can they have been unbuttoning?
Forma interro-Negação
Forma simple
can't I unbutton? can't you unbutton? can't he unbutton? can't we unbutton? can't you unbutton? can't they unbutton?
Forma com V-ing
can't I be unbuttoning? can't you be unbuttoning? can't he be unbuttoning? can't we be unbuttoning? can't you be unbuttoning? can't they be unbuttoning?
Perfeito
can't I have unbuttoned? can't you have unbuttoned? can't he have unbuttoned? can't we have unbuttoned? can't you have unbuttoned? can't they have unbuttoned?
Perfeito com V-ing
can't I have been unbuttoning? can't you have been unbuttoning? can't he have been unbuttoning? can't we have been unbuttoning? can't you have been unbuttoning? can't they have been unbuttoning?