| Präsens (Present) "research" | I | research | |
| Präsens Verlaufsform (Present continuous) "research" | I | am researching | |
| Präteritum (Simple past) "research" | I | researched | |
| Perfekt Verlaufsform (Past Continuous) "research" | I | was researching | |
| Present Perfect (Präsens) "research" | I | have researched | |
| Present Continuous (Futur) "research" | I | have been researching | |
| Plusquamperfekt (Past perfect) "research" | I | had researched | |
| Plusquamperfekt Verlaufsform (Past perfect continuous) "research" | I | had been researching | |
| Futur I (Future) "research" | I | will research | |
| Futur I Verlaufsform (Future continuous) "research" | I | will be researching | |
| Futur II (Future perfect) "research" | I | will have researched | |
| Futur II Verlaufsform (Future perfect continuous) "research" | I | will have been researching |