| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which prevented [pers pn] [prep] [v-ing] | 15 |
|
| 2 | which prevented [pron] [prep] [v-ing] | 15 |
|
| 3 | which prevented [pron] from [v-ing] | 15 |
|
| 4 | which prevented [pron] from [v-ing] | 15 |
|
| 5 | which prevented [pron] [prep] [v-ing] | 15 |
|
| 6 | which prevented them [prep] [v-ing] | 6 |
|
| 7 | which prevented they [prep] [v-ing] | 6 |
|
