| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [subord] [verb] | 13927 |
|
| 2 | [adv] [subord] [to-vb] | 2513 |
|
| 3 | [adv] [subord] prevent | 40 |
|
| 4 | [adv] [conj] to prevent | 33 |
|
| 5 | [adv] [subord] to prevent | 30 |
|
