| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may not have been | 248 |
|
| 2 | may not have be | 248 |
|
| 3 | may not have [be] | 248 |
|
| 4 | may not have [be] | 248 |
|
| 5 | may not have [been] | 248 |
|
| 6 | may not have [be] | 248 |
|
