| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] it [prep] [verb] | 1045 |
|
| 2 | [to-vb] it [prep] [verb] | 213 |
|
| 3 | to prevent [pron] [prep] [verb] | 140 |
|
| 4 | prevent it [prep] [verb] | 79 |
|
