| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may have been [adj] | 548 |
|
| 2 | [modal v] have been this | 16 |
|
| 3 | may have [been] this | 6 |
|
| 4 | may have [be] this | 6 |
|
| 5 | may have be this | 6 |
|
| 6 | may [verb] been this | 6 |
|
