I can button you can button she can button we can button you can button they can button
Forme en 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
Perfect
I can have buttoned you can have buttoned she can have buttoned we can have buttoned you can have buttoned they can have buttoned
Perfect en 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
Négation
Forme simple
I cannot button you cannot button she cannot button we cannot button you cannot button they cannot button
Forme en V-ing
I cannot be buttoning you cannot be buttoning she cannot be buttoning we cannot be buttoning you cannot be buttoning they cannot be buttoning
Perfect
I cannot have buttoned you cannot have buttoned she cannot have buttoned we cannot have buttoned you cannot have buttoned they cannot have buttoned
Perfect en V-ing
I cannot have been buttoning you cannot have been buttoning she cannot have been buttoning we cannot have been buttoning you cannot have been buttoning they cannot have been buttoning
Forme interrogative
Forme simple
can I button? can you button? can she button? can we button? can you button? can they button?
Forme en 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?
Perfect
can I have buttoned? can you have buttoned? can she have buttoned? can we have buttoned? can you have buttoned? can they have buttoned?
Perfect en 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?
Forme interro-négative
Forme simple
can I not button? can you not button? can she not button? can we not button? can you not button? can they not button?
Forme en V-ing
can I not be buttoning? can you not be buttoning? can she not be buttoning? can we not be buttoning? can you not be buttoning? can they not be buttoning?
Perfect
can I not have buttoned? can you not have buttoned? can she not have buttoned? can we not have buttoned? can you not have buttoned? can they not have buttoned?
Perfect en V-ing
can I not have been buttoning? can you not have been buttoning? can she not have been buttoning? can we not have been buttoning? can you not have been buttoning? can they not have been buttoning?