
Verbe régulier : back - backed - backed
Forme simple | Forme en V-ing | 
| I'd back you'd back he'd back we'd back you'd back they'd back  | I'd be backing you'd be backing he'd be backing we'd be backing you'd be backing they'd be backing  | 
Perfect | Perfect en V-ing | 
| I should've backed you should've backed he should've backed we should've backed you should've backed they should've backed  | I should've been backing you should've been backing he should've been backing we should've been backing you should've been backing they should've been backing  | 
Forme simple | Forme en V-ing | 
| I shouldn't back you shouldn't back he shouldn't back we shouldn't back you shouldn't back they shouldn't back  | I shouldn't be backing you shouldn't be backing he shouldn't be backing we shouldn't be backing you shouldn't be backing they shouldn't be backing  | 
Perfect | Perfect en V-ing | 
| I shouldn't have backed you shouldn't have backed he shouldn't have backed we shouldn't have backed you shouldn't have backed they shouldn't have backed  | I shouldn't have been backing you shouldn't have been backing he shouldn't have been backing we shouldn't have been backing you shouldn't have been backing they shouldn't have been backing  | 
Forme simple | Forme en V-ing | 
| should I back? should you back? should he back? should we back? should you back? should they back?  | should I be backing? should you be backing? should he be backing? should we be backing? should you be backing? should they be backing?  | 
Perfect | Perfect en V-ing | 
| should I have backed? should you have backed? should he have backed? should we have backed? should you have backed? should they have backed?  | should I have been backing? should you have been backing? should he have been backing? should we have been backing? should you have been backing? should they have been backing?  | 
Forme simple | Forme en V-ing | 
| shouldn't I back? shouldn't you back? shouldn't he back? shouldn't we back? shouldn't you back? shouldn't they back?  | shouldn't I be backing? shouldn't you be backing? shouldn't he be backing? shouldn't we be backing? shouldn't you be backing? shouldn't they be backing?  | 
Perfect | Perfect en V-ing | 
| shouldn't I have backed? shouldn't you have backed? shouldn't he have backed? shouldn't we have backed? shouldn't you have backed? shouldn't they have backed?  | shouldn't I have been backing? shouldn't you have been backing? shouldn't he have been backing? shouldn't we have been backing? shouldn't you have been backing? shouldn't they have been backing?  |