| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] have [been] the | 840 |
|
| 2 | [modal v] have [been] the | 840 |
|
| 3 | may have [been] [art] | 436 |
|
| 4 | may have [be] the | 177 |
|
| 5 | may have [been] the | 177 |
|
| 6 | may [verb] [been] the | 177 |
|
