| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] as prevent [art] | 10 |
|
| 2 | [adv] as to prevent [art] | 8 |
|
| 3 | so as prevent [art] | 8 |
|
| 4 | so as prevent [art] | 8 |
|
| 5 | [adv] as prevent the | 8 |
|
