| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] [vb infin] [been] [vb pp] | 5915 |
|
| 2 | [modal v] [vb infin] [been] [vb pp] | 5915 |
|
| 3 | may [vb infin] [been] [verb] | 1112 |
|
| 4 | may [vb infin] [be] [vb pp] | 1006 |
|
| 5 | may [vb infin] [been] [vb pp] | 987 |
|
| 6 | may [verb] [been] [vb pp] | 987 |
|
