| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] to prevent [pron] [prep] [be] [verb] | 9 |
|
| 2 | [noun sg] to prevent [pron] [prep] [be] [verb] | 7 |
|
| 3 | to prevent [pron] [prep] [be] [verb] [prep] | 5 |
|
| 4 | to prevent [pron] [prep] [be] [verb] [prep] | 5 |
|
