| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may [adv] have been [prep] | 33 |
|
| 2 | [adv] have been [prep] [det] | 18 |
|
| 3 | may have been [prep] [det] | 13 |
|
| 4 | may [adv] have been [det] | 11 |
|
