| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [modal v] [vb infin] prevent [adj] | 6 |
|
| 2 | [modal v] [vb infin] prevent [adj] [noun] | 9 |
|
| 3 | [modal v] [vb infin] prevent [adj] [noun sg] | 5 |
|
