| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [verb] [pron] [prep] | 1963 |
|
| 2 | [verb] prevent [pron] [prep] | 87 |
|
| 3 | have prevent [pron] [prep] | 46 |
|
| 4 | [vb infin] prevent [pron] [prep] | 22 |
|
