| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | ensure that [pers pn] [verb] [pron] | 9 |
|
| 2 | ensure that [pers pn] [vb base] [pron] | 7 |
|
| 3 | ensure that [pers pn] [verb] [pos pn] | 5 |
|
