| Presente (Present) "curtail" | I | curtail | |
| Presente continuo (Present Continuous) "curtail" | I | am curtailing | |
| Pasado simple (Simple past) "curtail" | I | curtailed | |
| Pasado continuo (Past Continuous) "curtail" | I | was curtailing | |
| Presente perfecto (Present perfect) "curtail" | I | have curtailed | |
| Presente perfecto continuo (Present perfect continuous) "curtail" | I | have been curtailing | |
| Pasado perfecto (Past perfect) "curtail" | I | had curtailed | |
| Pasado perfecto continuo (Past perfect continuous) "curtail" | I | had been curtailing | |
| Futuro (Future) "curtail" | I | will curtail | |
| Futuro continuo (Future continuous) "curtail" | I | will be curtailing | |
| Futuro perfecto (Future perfect) "curtail" | I | will have curtailed | |
| Futuro perfecto continuo (Future perfect continuous) "curtail" | I | will have been curtailing |