| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may not [verb] [been] | 248 |
|
| 2 | may not [verb] [noun pl] | 52 |
|
| 3 | may [verb] [been] [noun pl] | 42 |
|
| 4 | not [verb] [been] [noun pl] | 8 |
|
