| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] [verb] [conj] it [verb] | 61 |
|
| 2 | [vb pp] [to-vb] [conj] it [verb] | 54 |
|
| 3 | [verb] to ensure [conj] it [verb] | 19 |
|
| 4 | [vb pp] to ensure [conj] [pron] [verb] | 17 |
|
| 5 | [vb pp] ensure [conj] it [verb] | 6 |
|
