| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [verb] [pron] [prep] [verb] | 345 |
|
| 2 | [vb past] [to-vb] [pron] [prep] [verb] | 136 |
|
| 3 | [verb] to prevent [pron] [prep] [verb] | 32 |
|
| 4 | [vb past] prevent [pron] [prep] [verb] | 25 |
|
