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