| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may have [been] for | 10 |
|
| 2 | may [verb] [been] for | 10 |
|
| 3 | may [vb infin] [been] for | 10 |
|
| 4 | may [verb] been for | 10 |
|
| 5 | may have [been] for | 10 |
|
