| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must be [prep] [art] [noun] | 256 |
|
| 2 | it must be [art] [noun] | 206 |
|
| 3 | it must be [prep] [art] | 48 |
|
| 4 | it must be [prep] [noun] | 36 |
|
| 5 | it be [prep] [art] [noun] | 15 |
|
