
Verbo regular: improve - improved - improved
Forma simple | Forma con V-ing | 
| I'd improve you'd improve he'd improve we'd improve you'd improve they'd improve  | I'd be improving you'd be improving he'd be improving we'd be improving you'd be improving they'd be improving  | 
Perfecto | Perfecto con V-ing | 
| I should've improved you should've improved he should've improved we should've improved you should've improved they should've improved  | I should've been improving you should've been improving he should've been improving we should've been improving you should've been improving they should've been improving  | 
Forma simple | Forma con V-ing | 
| I shouldn't improve you shouldn't improve he shouldn't improve we shouldn't improve you shouldn't improve they shouldn't improve  | I shouldn't be improving you shouldn't be improving he shouldn't be improving we shouldn't be improving you shouldn't be improving they shouldn't be improving  | 
Perfecto | Perfecto con V-ing | 
| I shouldn't have improved you shouldn't have improved he shouldn't have improved we shouldn't have improved you shouldn't have improved they shouldn't have improved  | I shouldn't have been improving you shouldn't have been improving he shouldn't have been improving we shouldn't have been improving you shouldn't have been improving they shouldn't have been improving  | 
Forma simple | Forma con V-ing | 
| should I improve? should you improve? should he improve? should we improve? should you improve? should they improve?  | should I be improving? should you be improving? should he be improving? should we be improving? should you be improving? should they be improving?  | 
Perfecto | Perfecto con V-ing | 
| should I have improved? should you have improved? should he have improved? should we have improved? should you have improved? should they have improved?  | should I have been improving? should you have been improving? should he have been improving? should we have been improving? should you have been improving? should they have been improving?  | 
Forma simple | Forma con V-ing | 
| shouldn't I improve? shouldn't you improve? shouldn't he improve? shouldn't we improve? shouldn't you improve? shouldn't they improve?  | shouldn't I be improving? shouldn't you be improving? shouldn't he be improving? shouldn't we be improving? shouldn't you be improving? shouldn't they be improving?  | 
Perfecto | Perfecto con V-ing | 
| shouldn't I have improved? shouldn't you have improved? shouldn't he have improved? shouldn't we have improved? shouldn't you have improved? shouldn't they have improved?  | shouldn't I have been improving? shouldn't you have been improving? shouldn't he have been improving? shouldn't we have been improving? shouldn't you have been improving? shouldn't they have been improving?  |