| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] [adv] to ensure that | 17 |
|
| 2 | [v-ing] [adv] to ensure that | 11 |
|
| 3 | [vb past] [adv] to ensure that | 8 |
|
| 4 | work [adv] to ensure that | 7 |
|
| 5 | [verb] together to ensure that | 5 |
|
| 6 | [verb] carefully to ensure that | 5 |
|
| 7 | [verb] hard to ensure that | 5 |
|
