| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [be] [prep] | 4702 |
|
| 2 | must [be] [prep] | 1101 |
|
| 3 | [conj] must [be] | 750 |
|
| 4 | [conj] must [prep] | 20 |
|
