
Regular verb: differ - differed - differed
Simple form | V-ing form | 
| I'd differ you'd differ he'd differ we'd differ you'd differ they'd differ  | I'd be differing you'd be differing he'd be differing we'd be differing you'd be differing they'd be differing  | 
Perfect | V-ing perfect | 
| I should've differed you should've differed he should've differed we should've differed you should've differed they should've differed  | I should've been differing you should've been differing he should've been differing we should've been differing you should've been differing they should've been differing  | 
Simple form | V-ing form | 
| I shouldn't differ you shouldn't differ he shouldn't differ we shouldn't differ you shouldn't differ they shouldn't differ  | I shouldn't be differing you shouldn't be differing he shouldn't be differing we shouldn't be differing you shouldn't be differing they shouldn't be differing  | 
Perfect | V-ing perfect | 
| I shouldn't have differed you shouldn't have differed he shouldn't have differed we shouldn't have differed you shouldn't have differed they shouldn't have differed  | I shouldn't have been differing you shouldn't have been differing he shouldn't have been differing we shouldn't have been differing you shouldn't have been differing they shouldn't have been differing  | 
Simple form | V-ing form | 
| should I differ? should you differ? should he differ? should we differ? should you differ? should they differ?  | should I be differing? should you be differing? should he be differing? should we be differing? should you be differing? should they be differing?  | 
Perfect | V-ing perfect | 
| should I have differed? should you have differed? should he have differed? should we have differed? should you have differed? should they have differed?  | should I have been differing? should you have been differing? should he have been differing? should we have been differing? should you have been differing? should they have been differing?  | 
Simple form | V-ing form | 
| shouldn't I differ? shouldn't you differ? shouldn't he differ? shouldn't we differ? shouldn't you differ? shouldn't they differ?  | shouldn't I be differing? shouldn't you be differing? shouldn't he be differing? shouldn't we be differing? shouldn't you be differing? shouldn't they be differing?  | 
Perfect | V-ing perfect | 
| shouldn't I have differed? shouldn't you have differed? shouldn't he have differed? shouldn't we have differed? shouldn't you have differed? shouldn't they have differed?  | shouldn't I have been differing? shouldn't you have been differing? shouldn't he have been differing? shouldn't we have been differing? shouldn't you have been differing? shouldn't they have been differing?  |