| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] prevent [pron] | 150 |
|
| 2 | prevent [pron] [v-ing] | 65 |
|
| 3 | [modal v] [pron] [v-ing] | 12 |
|
| 4 | [modal v] prevent [v-ing] | 6 |
|
