| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [verb] [pron] [prep] [verb] | 111 |
|
| 2 | [pron] prevent [pron] [prep] [verb] | 66 |
|
| 3 | [Wh det] prevent [pron] [prep] [verb] | 40 |
|
