| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | ensure that [pers pn] is [adv] [vb pp] | 10 |
|
| 2 | ensure [that] it is [adv] [vb pp] | 9 |
|
| 3 | to ensure [that] [pers pn] is [adv] [vb pp] | 5 |
|
