| singular | plural |
| Infinitive | | |
| confirm | |
| present simple | | |
| 1 | I confirm | we confirm |
| 2 | you confirm | you confirm |
| 3 | he/she/it confirms | they confirm |
| past simple | | |
| 1 | I confirmed | we confirmed |
| 2 | you confirmed | you confirmed |
| 3 | he/she/it confirmed | they confirmed |
| future simple | | |
| 1 | I will/shall confirm | we will/shall confirm |
| 2 | you will/shall confirm | you will/shall confirm |
| 3 | he/she/it will/shall confirm | they will/shall confirm |
| conditional simple | | |
| 1 | I would confirm | we would confirm |
| 2 | you would confirm | you would confirm |
| 3 | he/she/it would confirm | they would confirm |
| present continuous | | |
| 1 | I am confirming | we are confirming |
| 2 | you are confirming | you are confirming |
| 3 | he/she/it is confirming | they are confirming |
| past continuous | | |
| 1 | I was confirming | we were confirming |
| 2 | you were confirming | you were confirming |
| 3 | he/she/it was confirming | they were confirming |
| future continuous | | |
| 1 | I will be confirming | we will be confirming |
| 2 | you will be confirming | you will be confirming |
| 3 | he/she/it will be confirming | they will be confirming |
| conditional continuous | | |
| 1 | I would be confirming | we would be confirming |
| 2 | you would be confirming | you would be confirming |
| 3 | he/she/it would be confirming | they would be confirming |
| present perfect | | |
| 1 | I have confirmed | we have confirmed |
| 2 | you have confirmed | you have confirmed |
| 3 | he/she/it has confirmed | they have confirmed |
| past perfect | | |
| 1 | I had confirmed | we had confirmed |
| 2 | you had confirmed | you had confirmed |
| 3 | he/she/it had confirmed | they had confirmed |
| future perfect | | |
| 1 | I will have confirmed | we will have confirmed |
| 2 | you will have confirmed | you will have confirmed |
| 3 | he/she/it will have confirmed | they will have confirmed |
| conditional perfect | | |
| 1 | I would have confirmed | we would have confirmed |
| 2 | you would have confirmed | you would have confirmed |
| 3 | he/she/it would have confirmed | they would have confirmed |
