| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] [be] | 41872 |
|
| 2 | [noun] must [be] | 11000 |
|
| 3 | [noun] must [prep] | 176 |
|
| 4 | must [prep] [be] | 149 |
|
