| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | try to prevent [pron] from [verb] | 6 |
|
| 2 | try to prevent [pron] from [verb] | 6 |
|
| 3 | try to prevent [pron] [prep] [v-ing] | 6 |
|
| 4 | try to prevent [pron] [prep] [verb] | 6 |
|
| 5 | try to prevent [pers pn] [prep] [verb] | 5 |
|
