| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [vb mod] have been [v-ing] | 285 |
|
| 2 | [noun] have been [v-ing] at | 149 |
|
| 3 | [noun] [vb mod] have been at | 43 |
|
| 4 | [vb mod] have been [v-ing] at | 13 |
|
