| Present "confirm" | I | confirm | |
| Present Continuous "confirm" | I | am confirming | |
| Simple past "confirm" | I | confirmed | |
| Past Continuous "confirm" | I | was confirming | |
| Present perfect "confirm" | I | have confirmed | |
| Present perfect continuous "confirm" | I | have been confirming | |
| Past perfect "confirm" | I | had confirmed | |
| Past perfect continuous "confirm" | I | had been confirming | |
| Future "confirm" | I | will confirm | |
| Future continuous "confirm" | I | will be confirming | |
| Future perfect "confirm" | I | will have confirmed | |
| Future perfect continuous "confirm" | I | will have been confirming |