| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who have been at [noun] [prep] | 16 |
|
| 2 | who have been at [noun prp] [prep] | 11 |
|
| 3 | who had been at [noun] [prep] | 9 |
|
| 4 | who have been at [noun] with | 6 |
|
