| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [vb pp] [prep] be [adj] | 456 |
|
| 2 | must [be] [vb pp] [prep] [adj] | 380 |
|
| 3 | must [be] [vb pp] [prep] be | 70 |
|
