| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] have been [adj] | 1253 |
|
| 2 | may [adv] have been | 768 |
|
| 3 | may have been [adj] | 452 |
|
| 4 | may [adv] have [adj] | 81 |
|
