| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may have [been] [adj] | 548 |
|
| 2 | [modal v] have [been] [det] | 361 |
|
| 3 | may [vb infin] [been] [det] | 49 |
|
| 4 | may [verb] [been] [det] | 49 |
|
| 5 | may have [be] [det] | 49 |
|
| 6 | may have [been] [det] | 49 |
|
