| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [subord] [verb] [pron] [prep] [verb] | 34 |
|
| 2 | [subord] [to-vb] [pron] [prep] [verb] | 17 |
|
| 3 | [conj] to prevent [pron] [prep] [verb] | 9 |
|
| 4 | [subord] prevent [pron] [prep] [verb] | 6 |
|
