| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must work [prep] the [noun] | 11 |
|
| 2 | must work [prep] the [noun] | 11 |
|
| 3 | must work [prep] the [noun sg] | 8 |
|
| 4 | must work within the [noun] | 5 |
|
