| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | ensure that [pers pn] is not [verb] | 7 |
|
| 2 | ensure that it is not [verb] | 6 |
|
| 3 | ensure that [pers pn] is not [vb pp] | 6 |
|
| 4 | to ensure that [pers pn] is not [verb] | 5 |
|
