
Verbo regular: sum - summed - summed
Presente | Presente continuo | Pretérito | Pretérito continuo | 
| I sum you sum he sums we sum you sum they sum  | I'm summing you're summing he's summing we're summing you're summing they're summing  | I summed you summed he summed we summed you summed they summed  | I was summing you were summing he was summing we were summing you were summing they were summing  | 
Presente perfecto | Presente perfecto continuo | Pluscuamperfecto | Pluscuamperfecto continuo | 
| I've summed you've summed he's summed we've summed you've summed they've summed  | I've been summing you've been summing he's been summing we've been summing you've been summing they've been summing  | I'd summed you'd summed he'd summed we'd summed you'd summed they'd summed  | I'd been summing you'd been summing he'd been summing we'd been summing you'd been summing they'd been summing  | 
Futuro simple | Futuro continuo | Futuro perfecto | Futuro perfecto contínuo | 
| I'll sum you'll sum he'll sum we'll sum you'll sum they'll sum  | I'll be summing you'll be summing he'll be summing we'll be summing you'll be summing they'll be summing  | I'll have summed you'll have summed he'll have summed we'll have summed you'll have summed they'll have summed  | I'll have been summing you'll have been summing he'll have been summing we'll have been summing you'll have been summing they'll have been summing  | 
Presente | Presente continuo | Passado | Passado continuo | 
| I'd sum you'd sum he'd sum we'd sum you'd sum they'd sum  | I'd be summing you'd be summing he'd be summing we'd be summing you'd be summing they'd be summing  | I'd have summed you'd have summed he'd have summed we'd have summed you'd have summed they'd have summed  | I'd have been summing you'd have been summing he'd have been summing we'd have been summing you'd have been summing they'd have been summing  | 
Infinitivo | Imperativo | 
Infinitivo | Imperativo | ||
| to sum | sum Let's sum sum  | 
Presente | Passado | ||
| summing | summed |