I may buttress you may buttress he may buttress we may buttress you may buttress they may buttress
Forme en V-ing
I may be buttressing you may be buttressing he may be buttressing we may be buttressing you may be buttressing they may be buttressing
Perfect
I may have buttressed you may have buttressed he may have buttressed we may have buttressed you may have buttressed they may have buttressed
Perfect en V-ing
I may have been buttressing you may have been buttressing he may have been buttressing we may have been buttressing you may have been buttressing they may have been buttressing
Négation
Forme simple
I may not buttress you may not buttress he may not buttress we may not buttress you may not buttress they may not buttress
Forme en V-ing
I may not be buttressing you may not be buttressing he may not be buttressing we may not be buttressing you may not be buttressing they may not be buttressing
Perfect
I may not have buttressed you may not have buttressed he may not have buttressed we may not have buttressed you may not have buttressed they may not have buttressed
Perfect en V-ing
I may not have been buttressing you may not have been buttressing he may not have been buttressing we may not have been buttressing you may not have been buttressing they may not have been buttressing
Forme interrogative
Forme simple
may I buttress? may you buttress? may he buttress? may we buttress? may you buttress? may they buttress?
Forme en V-ing
may I be buttressing? may you be buttressing? may he be buttressing? may we be buttressing? may you be buttressing? may they be buttressing?
Perfect
may I have buttressed? may you have buttressed? may he have buttressed? may we have buttressed? may you have buttressed? may they have buttressed?
Perfect en V-ing
may I have been buttressing? may you have been buttressing? may he have been buttressing? may we have been buttressing? may you have been buttressing? may they have been buttressing?
Forme interro-négative
Forme simple
may I not buttress? may you not buttress? may he not buttress? may we not buttress? may you not buttress? may they not buttress?
Forme en V-ing
may I not be buttressing? may you not be buttressing? may he not be buttressing? may we not be buttressing? may you not be buttressing? may they not be buttressing?
Perfect
may I not have buttressed? may you not have buttressed? may he not have buttressed? may we not have buttressed? may you not have buttressed? may they not have buttressed?
Perfect en V-ing
may I not have been buttressing? may you not have been buttressing? may he not have been buttressing? may we not have been buttressing? may you not have been buttressing? may they not have been buttressing?