I can button you can button she can button we can button you can button they can button
Forma com V-ing
I can be buttoning you can be buttoning she can be buttoning we can be buttoning you can be buttoning they can be buttoning
Perfeito
I can have buttoned you can have buttoned she can have buttoned we can have buttoned you can have buttoned they can have buttoned
Perfeito com V-ing
I can have been buttoning you can have been buttoning she can have been buttoning we can have been buttoning you can have been buttoning they can have been buttoning
Negação
Forma simple
I can't button you can't button she can't button we can't button you can't button they can't button
Forma com V-ing
I can't be buttoning you can't be buttoning she can't be buttoning we can't be buttoning you can't be buttoning they can't be buttoning
Perfeito
I can't have buttoned you can't have buttoned she can't have buttoned we can't have buttoned you can't have buttoned they can't have buttoned
Perfeito com V-ing
I can't have been buttoning you can't have been buttoning she can't have been buttoning we can't have been buttoning you can't have been buttoning they can't have been buttoning
Forma interrogativa
Forma simple
can I button? can you button? can she button? can we button? can you button? can they button?
Forma com V-ing
can I be buttoning? can you be buttoning? can she be buttoning? can we be buttoning? can you be buttoning? can they be buttoning?
Perfeito
can I have buttoned? can you have buttoned? can she have buttoned? can we have buttoned? can you have buttoned? can they have buttoned?
Perfeito com V-ing
can I have been buttoning? can you have been buttoning? can she have been buttoning? can we have been buttoning? can you have been buttoning? can they have been buttoning?
Forma interro-Negação
Forma simple
can't I button? can't you button? can't she button? can't we button? can't you button? can't they button?
Forma com V-ing
can't I be buttoning? can't you be buttoning? can't she be buttoning? can't we be buttoning? can't you be buttoning? can't they be buttoning?
Perfeito
can't I have buttoned? can't you have buttoned? can't she have buttoned? can't we have buttoned? can't you have buttoned? can't they have buttoned?
Perfeito com V-ing
can't I have been buttoning? can't you have been buttoning? can't she have been buttoning? can't we have been buttoning? can't you have been buttoning? can't they have been buttoning?