| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [vb pp] in [adj] | 2136 |
|
| 2 | must [be] [vb pp] in | 917 |
|
| 3 | must [be] [vb pp] [adj] | 218 |
|
| 4 | must [be] in [adj] | 35 |
|
