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