| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which may have been [prep] | 7 |
|
| 2 | which may have been [prep] | 7 |
|
| 3 | which may [vb infin] been [prep] | 7 |
|
| 4 | which may [verb] been [prep] | 7 |
|
