| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [adv] be in [noun] | 228 |
|
| 2 | must [adv] be [prep] [noun] | 29 |
|
| 3 | must [adv] be in [noun] | 22 |
|
| 4 | must [adv] [be] in [noun] | 19 |
|
