| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [be] [noun] | 4332 |
|
| 2 | must [be] [noun] | 681 |
|
| 3 | [adv] must [be] | 273 |
|
| 4 | [adv] must [noun] | 14 |
|
