I may countersign you may countersign he may countersign we may countersign you may countersign they may countersign
Forme en V-ing
I may be countersigning you may be countersigning he may be countersigning we may be countersigning you may be countersigning they may be countersigning
Perfect
I may have countersigned you may have countersigned he may have countersigned we may have countersigned you may have countersigned they may have countersigned
Perfect en V-ing
I may have been countersigning you may have been countersigning he may have been countersigning we may have been countersigning you may have been countersigning they may have been countersigning
Négation
Forme simple
I mayn't countersign you mayn't countersign he mayn't countersign we mayn't countersign you mayn't countersign they mayn't countersign
Forme en V-ing
I mayn't be countersigning you mayn't be countersigning he mayn't be countersigning we mayn't be countersigning you mayn't be countersigning they mayn't be countersigning
Perfect
I mayn't have countersigned you mayn't have countersigned he mayn't have countersigned we mayn't have countersigned you mayn't have countersigned they mayn't have countersigned
Perfect en V-ing
I mayn't have been countersigning you mayn't have been countersigning he mayn't have been countersigning we mayn't have been countersigning you mayn't have been countersigning they mayn't have been countersigning
Forme interrogative
Forme simple
may I countersign? may you countersign? may he countersign? may we countersign? may you countersign? may they countersign?
Forme en V-ing
may I be countersigning? may you be countersigning? may he be countersigning? may we be countersigning? may you be countersigning? may they be countersigning?
Perfect
may I have countersigned? may you have countersigned? may he have countersigned? may we have countersigned? may you have countersigned? may they have countersigned?
Perfect en V-ing
may I have been countersigning? may you have been countersigning? may he have been countersigning? may we have been countersigning? may you have been countersigning? may they have been countersigning?
Forme interro-négative
Forme simple
mayn't I countersign? mayn't you countersign? mayn't he countersign? mayn't we countersign? mayn't you countersign? mayn't they countersign?
Forme en V-ing
mayn't I be countersigning? mayn't you be countersigning? mayn't he be countersigning? mayn't we be countersigning? mayn't you be countersigning? mayn't they be countersigning?
Perfect
mayn't I have countersigned? mayn't you have countersigned? mayn't he have countersigned? mayn't we have countersigned? mayn't you have countersigned? mayn't they have countersigned?
Perfect en V-ing
mayn't I have been countersigning? mayn't you have been countersigning? mayn't he have been countersigning? mayn't we have been countersigning? mayn't you have been countersigning? mayn't they have been countersigning?