| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [det] [vb mod] [verb] prevent | 9 |
|
| 2 | [adj] [vb mod] help prevent | 9 |
|
| 3 | [adj] [vb mod] [vb infin] prevent | 9 |
|
| 4 | [adj] [vb mod] help prevent | 9 |
|
| 5 | this [vb mod] [verb] prevent | 7 |
|
| 6 | this [vb mod] [verb] prevent | 7 |
|
