| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] [adv] be [vb pp] ensure that | 9 |
|
| 2 | [modal v] [adv] be [vb pp] to ensure that | 9 |
|
| 3 | [modal v] [adv] be [vb pp] ensure that | 8 |
|
