| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to prevent [pron] [noun pl] from [verb] | 14 |
|
| 2 | to prevent [pron] [noun pl] from [verb] | 14 |
|
| 3 | to prevent [pron] [noun pl] [prep] [v-ing] | 14 |
|
| 4 | to prevent [pron] [noun pl] [prep] [verb] | 14 |
|
| 5 | to prevent [pos pn] [noun pl] [prep] [verb] | 14 |
|
| 6 | to prevent their [noun pl] [prep] [verb] | 7 |
|
| 7 | to prevent their [noun pl] [prep] [verb] | 7 |
|
