| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] so as [verb] | 312 |
|
| 2 | [verb] so as [to-vb] | 311 |
|
| 3 | [verb] [adv] as to ensure | 7 |
|
| 4 | [verb] so as ensure | 7 |
|
| 5 | [verb] so [conj] to ensure | 7 |
|
