| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] have been [vb pp] a | 431 |
|
| 2 | [pron] should have been [vb pp] | 262 |
|
| 3 | [pron] should have [vb pp] a | 133 |
|
| 4 | [pron] should have been a | 113 |
|
| 5 | should have been [vb pp] a | 19 |
|
