| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may [verb] been [adj] year | 5 |
|
| 2 | may have been [adj] year | 5 |
|
| 3 | may have been [adj] year | 5 |
|
| 4 | may [verb] been [adj] years | 5 |
|
| 5 | may [vb infin] been [adj] year | 5 |
|
