| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they [vb past] been [v-ing] | 389 |
|
| 2 | which [vb past] been [v-ing] | 162 |
|
| 3 | which they [vb past] been | 89 |
|
| 4 | which they [vb past] [v-ing] | 7 |
|
