| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] they [prep] [verb] | 884 |
|
| 2 | prevent they [prep] [verb] | 170 |
|
| 3 | [vb base] they [prep] [verb] | 131 |
|
| 4 | prevent [pron] [prep] [verb] | 79 |
|
| 5 | prevent they [prep] [verb] | 28 |
|
