| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] which [pron] [be] [v-ing] [prep] | 43 |
|
| 2 | on which [pron] [be] [verb] [prep] | 24 |
|
| 3 | on [pron] [pron] [be] [v-ing] [prep] | 21 |
|
| 4 | on which [pron] [be] [v-ing] [prep] | 6 |
|
