| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] have been [verb] | 7119 |
|
| 2 | [vb mod] have [verb] an | 477 |
|
| 3 | have been [verb] an | 305 |
|
| 4 | [vb mod] have been an | 275 |
|
