| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [pron] [modal v] | 7098 |
|
| 2 | on which [pron] | 1512 |
|
| 3 | on [pron] [modal v] | 385 |
|
| 4 | on which [modal v] | 24 |
|
