| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] have been [verb] a | 917 |
|
| 2 | [pron] may have been [verb] | 328 |
|
| 3 | [pron] may have [verb] a | 163 |
|
| 4 | [pron] may have been a | 119 |
|
| 5 | may have been [verb] a | 17 |
|
