| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [be] [vb pp] [conj] | 1532 |
|
| 2 | [be] [vb pp] [conj] it | 901 |
|
| 3 | must [be] [conj] it | 20 |
|
| 4 | must [be] [vb pp] it | 5 |
|
