| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | so [verb] [conj] | 1015 |
|
| 2 | [adv] to ensure [conj] | 211 |
|
| 3 | so [to-vb] [conj] | 36 |
|
| 4 | so ensure [conj] | 16 |
|
