| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] must be [vb pp] | 6533 |
|
| 2 | [noun] must be [adj] | 1504 |
|
| 3 | must be [vb pp] [adj] | 218 |
|
| 4 | [noun] be [vb pp] [adj] | 77 |
|
