| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may [adv] have [been] | 520 |
|
| 2 | [adv] have [been] a | 249 |
|
| 3 | may have [been] a | 249 |
|
| 4 | may [adv] have a | 150 |
|
