| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which prevent [pron] from [verb] | 38 |
|
| 2 | which prevent [pron] [prep] [v-ing] | 38 |
|
| 3 | which prevent [pers pn] [prep] [verb] | 36 |
|
| 4 | which prevent them [prep] [verb] | 17 |
|
| 5 | which prevent they [prep] [verb] | 17 |
|
| 6 | which prevents [pron] [prep] [verb] | 15 |
|
| 7 | which prevented [pron] [prep] [verb] | 15 |
|
| 8 | which prevent [pron] [prep] [verb] | 8 |
|
| 9 | which prevent him [prep] [verb] | 6 |
|
| 10 | which prevent he [prep] [verb] | 6 |
|
