| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [verb] to ensure that such | 6 |
|
| 2 | be [verb] ensure that such | 6 |
|
| 3 | [be] [vb pp] ensure that such | 6 |
|
| 4 | [be] [verb] ensure that such | 6 |
|
