| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] been [v-ing] [det] | 225 |
|
| 2 | which [vb past] been [v-ing] | 162 |
|
| 3 | which [vb past] [v-ing] [det] | 12 |
|
| 4 | which [vb past] been [det] | 9 |
|
