| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] must [be] | 9041 |
|
| 2 | [pron] [prep] [be] | 7949 |
|
| 3 | [pron] must [prep] | 405 |
|
| 4 | must [prep] [be] | 149 |
|
