| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | prevent [pron] [noun sg] [prep] [v-ing] | 5 |
|
| 2 | prevent [pos pn] [noun sg] [prep] [verb] | 5 |
|
| 3 | prevent [pron] [noun sg] from [verb] | 5 |
|
