| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [not/n't] prevent [pron] [prep] [v-ing] | 61 |
|
| 2 | [not/n't] prevent [pers pn] [prep] [v-ing] | 50 |
|
| 3 | [not/n't] [verb] them [prep] [v-ing] | 42 |
|
| 4 | [not/n't] [vb infin] them [prep] [v-ing] | 35 |
|
| 5 | [not/n't] prevent them [prep] [v-ing] | 8 |
|
| 6 | [adv] prevent them [prep] [v-ing] | 8 |
|
| 7 | [not/n't] prevent them [prep] [verb] | 6 |
|
| 8 | [not/n't] prevent they [prep] [v-ing] | 6 |
|
| 9 | [not/n't] prevent them [prep] [v-ing] | 6 |
|
