| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [subord] [adv] [subord] [verb] | 2324 |
|
| 2 | [conj] [adv] [subord] prevent | 7 |
|
| 3 | [subord] [adv] [subord] prevent | 6 |
|
| 4 | [subord] [adv] [conj] prevent | 6 |
|
