| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who have been [v-ing] [prep] | 332 |
|
| 2 | have been [v-ing] [prep] this | 136 |
|
| 3 | who have been [prep] this | 8 |
|
| 4 | who have been [v-ing] this | 6 |
|
