| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may [adv] have been [prep] | 33 |
|
| 2 | may [adv] have been [prep] | 33 |
|
| 3 | may [adv] [vb infin] been [prep] | 33 |
|
| 4 | may well [verb] been [prep] | 16 |
|
| 5 | may [adv] [verb] been in | 14 |
|
| 6 | may also [verb] been [prep] | 9 |
|
