| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may have been [prep] | 145 |
|
| 2 | may have been [prep] | 145 |
|
| 3 | [vb mod] have been on | 129 |
|
| 4 | [modal v] have been on | 129 |
|
| 5 | may have be on | 10 |
|
| 6 | may have [be] on | 10 |
|
| 7 | may have [been] on | 9 |
|
| 8 | may have been on | 9 |
|
| 9 | may have been on | 9 |
|
| 10 | may [verb] been on | 9 |
|
