| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been [vb pp] at [det] time | 9 |
|
| 2 | have been [vb pp] at some time | 9 |
|
| 3 | have been [vb pp] at [det] time | 7 |
|
| 4 | have been [vb pp] at any time | 5 |
|
