| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | there may have been [noun] | 27 |
|
| 2 | [ex0] may have been [noun] | 27 |
|
| 3 | [ex0] may have been [noun] | 27 |
|
| 4 | [ex0] may have been [noun pl] | 19 |
|
| 5 | [ex0] may have been [noun sg] | 7 |
|
