| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | prevent or [vb infin] [art] | 12 |
|
| 2 | prevent or [vb infin] [art] | 12 |
|
| 3 | prevent or [vb infin] the | 11 |
|
| 4 | prevent or [vb infin] the | 11 |
|
| 5 | to prevent or [vb infin] [art] | 10 |
|
