| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] to ensure [that] | 173 |
|
| 2 | [adv] as to ensure | 41 |
|
| 3 | as to ensure [that] | 38 |
|
| 4 | [adv] as [that] | 9 |
|
