| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] so as [verb] | 749 |
|
| 2 | [noun] so as [to-vb] | 749 |
|
| 3 | [noun] so as prevent | 11 |
|
| 4 | [noun] so [conj] to prevent | 11 |
|
| 5 | [noun] [adv] as to prevent | 11 |
|
