| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [v-ing] [noun] | 417 |
|
| 2 | have been [v-ing] at | 90 |
|
| 3 | been [v-ing] [noun] at | 38 |
|
| 4 | have been [noun] at | 6 |
|
