| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it must be [prep] the [noun] | 20 |
|
| 2 | it must be [prep] the [noun] | 20 |
|
| 3 | it must be [prep] the [noun] | 20 |
|
| 4 | it must be [prep] the [noun] | 20 |
|
| 5 | it must be [prep] the [noun sg] | 18 |
|
| 6 | it must be in the [noun] | 7 |
|
| 7 | it must be in the [noun] | 7 |
|
