| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who [vb past] been [verb] for [v-ing] | 8 |
|
| 2 | who [vb past] been [vb pp] for [v-ing] | 8 |
|
| 3 | who had been [verb] for [v-ing] | 7 |
|
