| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | do not prevent him [prep] | 20 |
|
| 2 | [verb] not prevent him [prep] | 20 |
|
| 3 | did not prevent him [prep] | 15 |
|
| 4 | [vb past] not prevent him [prep] | 15 |
|
| 5 | [vb -s] not prevent him [prep] | 5 |
|
| 6 | does not prevent him [prep] | 5 |
|
| 7 | not prevent him [prep] [verb] | 20 |
|
| 8 | not prevent him [prep] [v-ing] | 20 |
|
