| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] [not/n't] [verb] [pron] [prep] [verb] | 43 |
|
| 2 | [verb] [not/n't] prevent [pron] [prep] [verb] | 41 |
|
| 3 | [vb -s] [adv] prevent [pron] [prep] [verb] | 14 |
|
| 4 | [vb -s] [not/n't] prevent [pron] [prep] [verb] | 13 |
|
