| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [prep] a [noun] | 528 |
|
| 2 | have been a [noun] at | 59 |
|
| 3 | have been [prep] [noun] at | 49 |
|
| 4 | been [prep] a [noun] at | 9 |
|
