I'll be backdating you'll be backdating she'll be backdating we'll be backdating you'll be backdating they'll be backdating
Perfect
I'll have backdated you'll have backdated she'll have backdated we'll have backdated you'll have backdated they'll have backdated
Perfect en V-ing
I'll have been backdating you'll have been backdating she'll have been backdating we'll have been backdating you'll have been backdating they'll have been backdating
Négation
Forme simple
I shan't backdate you shan't backdate she shan't backdate we shan't backdate you shan't backdate they shan't backdate
Forme en V-ing
I shan't be backdating you shan't be backdating she shan't be backdating we shan't be backdating you shan't be backdating they shan't be backdating
Perfect
I shan't have backdated you shan't have backdated she shan't have backdated we shan't have backdated you shan't have backdated they shan't have backdated
Perfect en V-ing
I shan't have been backdating you shan't have been backdating she shan't have been backdating we shan't have been backdating you shan't have been backdating they shan't have been backdating
Forme interrogative
Forme simple
shall I backdate? shall you backdate? shall she backdate? shall we backdate? shall you backdate? shall they backdate?
Forme en V-ing
shall I be backdating? shall you be backdating? shall she be backdating? shall we be backdating? shall you be backdating? shall they be backdating?
Perfect
shall I have backdated? shall you have backdated? shall she have backdated? shall we have backdated? shall you have backdated? shall they have backdated?
Perfect en V-ing
shall I have been backdating? shall you have been backdating? shall she have been backdating? shall we have been backdating? shall you have been backdating? shall they have been backdating?
Forme interro-négative
Forme simple
shan't I backdate? shan't you backdate? shan't she backdate? shan't we backdate? shan't you backdate? shan't they backdate?
Forme en V-ing
shan't I be backdating? shan't you be backdating? shan't she be backdating? shan't we be backdating? shan't you be backdating? shan't they be backdating?
Perfect
shan't I have backdated? shan't you have backdated? shan't she have backdated? shan't we have backdated? shan't you have backdated? shan't they have backdated?
Perfect en V-ing
shan't I have been backdating? shan't you have been backdating? shan't she have been backdating? shan't we have been backdating? shan't you have been backdating? shan't they have been backdating?