| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | was [vb pp] to ensure [conj] the | 14 |
|
| 2 | was [vb pp] to ensure [conj] [art] | 14 |
|
| 3 | was [vb pp] to ensure [conj] the | 14 |
|
| 4 | was [vb pp] to ensure that [art] | 14 |
|
| 5 | was [vb pp] to ensure that [art] | 14 |
|
| 6 | was [vb pp] to ensure [that] [art] | 14 |
|
