| Present "research" | I | research | |
| Present Continuous "research" | I | am researching | |
| Simple past "research" | I | researched | |
| Past Continuous "research" | I | was researching | |
| Present perfect "research" | I | have researched | |
| Present perfect continuous "research" | I | have been researching | |
| Past perfect "research" | I | had researched | |
| Past perfect continuous "research" | I | had been researching | |
| Future "research" | I | will research | |
| Future continuous "research" | I | will be researching | |
| Future perfect "research" | I | will have researched | |
| Future perfect continuous "research" | I | will have been researching |