| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb infin] [pron] [conj] [art] | 565 |
|
| 2 | [vb infin] to ensure [conj] [art] | 54 |
|
| 3 | [pron] to ensure [conj] [art] | 18 |
|
| 4 | [vb infin] [pron] to ensure [conj] | 8 |
|
