| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who have been [v-ing] [prep] this | 5 |
|
| 2 | who have been [v-ing] [prep] this | 5 |
|
| 3 | who have been [v-ing] this [noun] | 6 |
|
| 4 | who have been [v-ing] this [noun sg] | 5 |
|
