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