| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [vb pp] [prep] [art] [det] | 2224 |
|
| 2 | must [be] [vb pp] [prep] [art] | 2035 |
|
| 3 | must [be] [vb pp] [prep] [det] | 404 |
|
| 4 | must [be] [prep] [art] [det] | 12 |
|
