I'd be backdating you'd be backdating he'd be backdating we'd be backdating you'd be backdating they'd be backdating
Perfect
I would've backdated you would've backdated he would've backdated we would've backdated you would've backdated they would've backdated
V-ing perfect
I would've been backdating you would've been backdating he would've been backdating we would've been backdating you would've been backdating they would've been backdating
Negation
Simple form
I wouldn't backdate you wouldn't backdate he wouldn't backdate we wouldn't backdate you wouldn't backdate they wouldn't backdate
V-ing form
I wouldn't be backdating you wouldn't be backdating he wouldn't be backdating we wouldn't be backdating you wouldn't be backdating they wouldn't be backdating
Perfect
I wouldn't have backdated you wouldn't have backdated he wouldn't have backdated we wouldn't have backdated you wouldn't have backdated they wouldn't have backdated
V-ing perfect
I wouldn't have been backdating you wouldn't have been backdating he wouldn't have been backdating we wouldn't have been backdating you wouldn't have been backdating they wouldn't have been backdating
Interrogative form
Simple form
would I backdate? would you backdate? would he backdate? would we backdate? would you backdate? would they backdate?
V-ing form
would I be backdating? would you be backdating? would he be backdating? would we be backdating? would you be backdating? would they be backdating?
Perfect
would I have backdated? would you have backdated? would he have backdated? would we have backdated? would you have backdated? would they have backdated?
V-ing perfect
would I have been backdating? would you have been backdating? would he have been backdating? would we have been backdating? would you have been backdating? would they have been backdating?
Interro-negative form
Simple form
wouldn't I backdate? wouldn't you backdate? wouldn't he backdate? wouldn't we backdate? wouldn't you backdate? wouldn't they backdate?
V-ing form
wouldn't I be backdating? wouldn't you be backdating? wouldn't he be backdating? wouldn't we be backdating? wouldn't you be backdating? wouldn't they be backdating?
Perfect
wouldn't I have backdated? wouldn't you have backdated? wouldn't he have backdated? wouldn't we have backdated? wouldn't you have backdated? wouldn't they have backdated?
V-ing perfect
wouldn't I have been backdating? wouldn't you have been backdating? wouldn't he have been backdating? wouldn't we have been backdating? wouldn't you have been backdating? wouldn't they have been backdating?