| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [be] [vb pp] [prep] [art] | 2033 |
|
| 2 | [be] [vb pp] [prep] [art] time | 171 |
|
| 3 | must [be] [vb pp] [prep] time | 8 |
|
