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