| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] they [v-ing] | 1435 |
|
| 2 | [vb infin] they [v-ing] | 366 |
|
| 3 | prevent they [v-ing] | 109 |
|
| 4 | prevent [pron] [v-ing] | 65 |
|
| 5 | prevent they [verb] | 9 |
|
