| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [vb infin] been | 21446 |
|
| 2 | may [vb infin] [be] | 2962 |
|
| 3 | may [vb infin] be | 2962 |
|
| 4 | may [vb infin] [been] | 2865 |
|
| 5 | may [verb] been | 2865 |
|
