| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] may [adv] have been [noun] | 5 |
|
| 2 | [noun] may [adv] [vb infin] been [noun] | 5 |
|
| 3 | [noun] may [adv] [verb] been [noun] | 5 |
|
| 4 | [noun] may [adv] have been [noun] | 5 |
|
