I'd back you'd back she'd back we'd back you'd back they'd back
Forme en V-ing
I'd be backing you'd be backing she'd be backing we'd be backing you'd be backing they'd be backing
Perfect
I should've backed you should've backed she should've backed we should've backed you should've backed they should've backed
Perfect en V-ing
I should've been backing you should've been backing she should've been backing we should've been backing you should've been backing they should've been backing
Négation
Forme simple
I shouldn't back you shouldn't back she shouldn't back we shouldn't back you shouldn't back they shouldn't back
Forme en V-ing
I shouldn't be backing you shouldn't be backing she shouldn't be backing we shouldn't be backing you shouldn't be backing they shouldn't be backing
Perfect
I shouldn't have backed you shouldn't have backed she shouldn't have backed we shouldn't have backed you shouldn't have backed they shouldn't have backed
Perfect en V-ing
I shouldn't have been backing you shouldn't have been backing she shouldn't have been backing we shouldn't have been backing you shouldn't have been backing they shouldn't have been backing
Forme interrogative
Forme simple
should I back? should you back? should she back? should we back? should you back? should they back?
Forme en V-ing
should I be backing? should you be backing? should she be backing? should we be backing? should you be backing? should they be backing?
Perfect
should I have backed? should you have backed? should she have backed? should we have backed? should you have backed? should they have backed?
Perfect en V-ing
should I have been backing? should you have been backing? should she have been backing? should we have been backing? should you have been backing? should they have been backing?
Forme interro-négative
Forme simple
shouldn't I back? shouldn't you back? shouldn't she back? shouldn't we back? shouldn't you back? shouldn't they back?
Forme en V-ing
shouldn't I be backing? shouldn't you be backing? shouldn't she be backing? shouldn't we be backing? shouldn't you be backing? shouldn't they be backing?
Perfect
shouldn't I have backed? shouldn't you have backed? shouldn't she have backed? shouldn't we have backed? shouldn't you have backed? shouldn't they have backed?
Perfect en V-ing
shouldn't I have been backing? shouldn't you have been backing? shouldn't she have been backing? shouldn't we have been backing? shouldn't you have been backing? shouldn't they have been backing?