| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] they [prep] [verb] | 884 |
|
| 2 | prevent they [prep] [verb] | 170 |
|
| 3 | [vb infin] they [prep] [verb] | 153 |
|
| 4 | prevent [pron] [prep] [verb] | 138 |
|
| 5 | prevent they [prep] [verb] | 25 |
|
