| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [be] [prep] one | 12 |
|
| 2 | must be [prep] one | 12 |
|
| 3 | must be [prep] one | 12 |
|
| 4 | must [be] [prep] one | 12 |
|
| 5 | must [be] in one | 5 |
|
