| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must not be [vb pp] | 544 |
|
| 2 | not be [vb pp] [adj] | 320 |
|
| 3 | must be [vb pp] [adj] | 218 |
|
| 4 | must not be [adj] | 114 |
|
