| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [vb pp] at the time | 44 |
|
| 2 | have been [vb pp] at the time | 44 |
|
| 3 | had been [vb pp] at the time | 19 |
|
| 4 | to have been [vb pp] at the time | 11 |
|
| 5 | have been [vb pp] at the time | 8 |
|
| 6 | have been effected at the time | 5 |
|
