| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [subord] [verb] [conj] | 587 |
|
| 2 | [adv] [subord] [to-vb] [conj] | 169 |
|
| 3 | [adv] [conj] to ensure [conj] | 30 |
|
| 4 | [adv] [subord] ensure [conj] | 29 |
|
