| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [subord] to ensure that | 24 |
|
| 2 | [vb pp] [adv] to ensure that | 17 |
|
| 3 | [vb pp] [adv] [subord] to ensure | 7 |
|
| 4 | [vb pp] [adv] [subord] that | 6 |
|
