| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may have been [prep] [det] | 13 |
|
| 2 | may [vb infin] been [prep] [det] | 13 |
|
| 3 | may [vb infin] been [prep] [det] | 13 |
|
| 4 | may [vb infin] been [prep] this | 5 |
|
