| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [be] [prep] | 70724 |
|
| 2 | [noun] must [be] | 11000 |
|
| 3 | must [be] [prep] | 1101 |
|
| 4 | [noun] must [prep] | 176 |
|
