| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] have been [verb] [prep] a | 12 |
|
| 2 | [vb base] have been [vb pp] [prep] a | 12 |
|
| 3 | [vb base] to have been [verb] [prep] a | 12 |
|
| 4 | seem have been [verb] [prep] a | 6 |
|
| 5 | appear have been [verb] [prep] a | 5 |
|
