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