| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] [vb mod] have been an | 86 |
|
| 2 | it [vb mod] have been an | 62 |
|
| 3 | [pers pn] would have been an | 25 |
|
| 4 | [pers pn] must have been an | 19 |
|
| 5 | [pers pn] could have been an | 16 |
|
| 6 | he [vb mod] have been an | 13 |
|
| 7 | [pers pn] may have been an | 10 |
|
| 8 | [pers pn] might have been an | 9 |
|
| 9 | [pers pn] should have been an | 6 |
|
