| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which has been [v-ing] a [adj] | 6 |
|
| 2 | which [vb -s] been [v-ing] a [adj] | 6 |
|
| 3 | which [vb -s] been [v-ing] a [adj] | 6 |
|
