| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] it [prep] [verb] [adv] | 109 |
|
| 2 | to prevent [pron] [prep] [verb] [adv] | 32 |
|
| 3 | [to-vb] it [prep] [verb] [adv] | 32 |
|
| 4 | prevent it [prep] [verb] [adv] | 20 |
|
| 5 | to prevent it [prep] [verb] [adv] | 10 |
|
