| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] to ensure that this [noun] | 8 |
|
| 2 | [verb] ensure that this [noun] | 8 |
|
| 3 | [verb] ensure that this [noun] | 8 |
|
| 4 | [verb] ensure that this [noun sg] | 8 |
|
