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