| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [vb pp] at | 332 |
|
| 2 | have been [vb pp] a | 163 |
|
| 3 | been [vb pp] at a | 147 |
|
| 4 | have [vb pp] at a | 47 |
|
