| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] has been [v-ing] [noun] at | 7 |
|
| 2 | [noun prp] has been [v-ing] [noun] at | 5 |
|
| 3 | has been [v-ing] [noun] [noun] at | 8 |
|
| 4 | has been [v-ing] [noun] [noun] at | 8 |
|
| 5 | has been [v-ing] [noun] [noun pl] at | 5 |
|
