| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [verb] a [noun] | 1050 |
|
| 2 | may have [verb] a [noun] | 148 |
|
| 3 | may have been a [noun] | 113 |
|
| 4 | may have been [verb] [noun] | 27 |
|
| 5 | may have been [verb] a | 15 |
|
