| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [v-ing] [prep] [noun] | 1324 |
|
| 2 | have been [prep] [noun] at | 49 |
|
| 3 | have been [v-ing] [noun] at | 34 |
|
| 4 | been [v-ing] [prep] [noun] at | 18 |
|
| 5 | have been [v-ing] [prep] at | 8 |
|
