| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] to prevent [pron] [noun sg] [prep] [verb] | 7 |
|
| 2 | to prevent [pron] [noun sg] [prep] [verb] [prep] | 5 |
|
| 3 | to prevent [pron] [noun sg] [prep] [verb] [prep] | 5 |
|
