| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have been as | 60 |
|
| 2 | [vb mod] have been as | 60 |
|
| 3 | [modal v] have been as | 60 |
|
| 4 | would have been as | 18 |
|
| 5 | may have been as | 15 |
|
| 6 | may have been as | 15 |
|
| 7 | would have been as | 13 |
|
| 8 | must have been as | 10 |
|
| 9 | must have been as | 10 |
|
| 10 | might have been as | 6 |
|
| 11 | might have been as | 6 |
|
| 12 | 'd have been as | 5 |
|
