| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may not be [vb pp] [prep] | 246 |
|
| 2 | or may not be [vb pp] | 58 |
|
| 3 | or may be [vb pp] [prep] | 43 |
|
| 4 | or may not be [prep] | 9 |
|
