| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to prevent [pers pn] from [v-ing] [prep] the | 7 |
|
| 2 | to prevent [pers pn] from [v-ing] [prep] the | 7 |
|
| 3 | to prevent [pers pn] [prep] [v-ing] [prep] the | 7 |
|
