| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | not prevent [pron] [prep] [verb] the | 8 |
|
| 2 | not prevent [pron] [prep] [v-ing] the | 8 |
|
| 3 | not prevent [pron] from [verb] the | 8 |
|
| 4 | not prevent [pers pn] [prep] [verb] the | 7 |
|
