| Present "attest" | I | attest | |
| Present Continuous "attest" | I | am attesting | |
| Simple past "attest" | I | attested | |
| Past Continuous "attest" | I | was attesting | |
| Present perfect "attest" | I | have attested | |
| Present perfect continuous "attest" | I | have been attesting | |
| Past perfect "attest" | I | had attested | |
| Past perfect continuous "attest" | I | had been attesting | |
| Future "attest" | I | will attest | |
| Future continuous "attest" | I | will be attesting | |
| Future perfect "attest" | I | will have attested | |
| Future perfect continuous "attest" | I | will have been attesting |