| 現在 (Present) "prolong" | I | prolong | |
| 現在継続 (Present Continuous) "prolong" | I | am prolonging | |
| 単純な過去 (Simple past) "prolong" | I | prolonged | |
| 過去継続 (Past Continuous) "prolong" | I | was prolonging | |
| 現在完了 (Present perfect) "prolong" | I | have prolonged | |
| 連続完璧な存在 (Present perfect continuous) "prolong" | I | have been prolonging | |
| 過去完了 (Past perfect) "prolong" | I | had prolonged | |
| 過去の完璧な連続 (Past perfect continuous) "prolong" | I | had been prolonging | |
| 未来 (Future) "prolong" | I | will prolong | |
| 連続将来 (Future continuous) "prolong" | I | will be prolonging | |
| 未来完了 (Future perfect) "prolong" | I | will have prolonged | |
| 連続完璧な将来 (Future perfect continuous) "prolong" | I | will have been prolonging |