| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may have been [adv] | 293 |
|
| 2 | [modal v] have been as | 60 |
|
| 3 | may [verb] been as | 15 |
|
| 4 | may have [been] as | 15 |
|
| 5 | may have [be] as | 15 |
|
| 6 | may have be as | 15 |
|
