| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | prevent [pron] from [verb] it | 7 |
|
| 2 | prevent [pron] [prep] [verb] it | 7 |
|
| 3 | prevent [pron] [prep] [v-ing] it | 7 |
|
| 4 | prevent [pers pn] [prep] [verb] it | 6 |
|
