| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must be [prep] the [noun] | 183 |
|
| 2 | it must be the [noun] | 83 |
|
| 3 | it must be [prep] [noun] | 36 |
|
| 4 | it must be [prep] the | 29 |
|
| 5 | it be [prep] the [noun] | 11 |
|
