| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may [adv] have been [adj] | 114 |
|
| 2 | [adv] have been [prep] [adj] | 49 |
|
| 3 | may [adv] have been [prep] | 33 |
|
| 4 | may have been [prep] [adj] | 33 |
|
