| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may have been [verb] for | 30 |
|
| 2 | may have been [adj] for | 29 |
|
| 3 | may have been [adj] for | 28 |
|
| 4 | may have been [vb pp] for | 27 |
|
| 5 | may have been responsible for | 20 |
|
| 6 | may have been responsible for | 20 |
|
| 7 | may have been use for | 5 |
|
| 8 | may have been used for | 5 |
|
| 9 | may have been for [noun] | 5 |
|
