| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who have been [v-ing] to | 23 |
|
| 2 | who had been [v-ing] to | 9 |
|
| 3 | who have been [v-ing] to | 7 |
|
| 4 | who have been listening to | 5 |
|
