| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [vb past] [been] [verb] | 2021 |
|
| 2 | [vb past] [been] [verb] [det] | 422 |
|
| 3 | which [vb past] [verb] [det] | 192 |
|
| 4 | which [vb past] [been] [det] | 9 |
|
