| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] be [vb pp] [prep] [art] | 29465 |
|
| 2 | must be [verb] [prep] [art] | 2092 |
|
| 3 | must [be] [vb pp] [prep] [art] | 2035 |
|
| 4 | must be [vb pp] [prep] [art] | 2035 |
|
| 5 | must be [vb pp] [prep] [art] | 2035 |
|
