| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | so [conj] [verb] [conj] [art] | 9 |
|
| 2 | [adv] [conj] to ensure [conj] [art] | 8 |
|
| 3 | so [conj] [to-vb] [conj] [art] | 8 |
|
| 4 | so [conj] to ensure [conj] [art] | 6 |
|
| 5 | so [conj] ensure [conj] [art] | 6 |
|
