| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [pron] [adv] [be] | 10 |
|
| 2 | must [pron] [adv] be | 10 |
|
| 3 | must [pers pn] [adv] [be] | 9 |
|
| 4 | must [pron] always [be] | 6 |
|
