| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [prep] [Wh det] they must | 22 |
|
| 2 | [noun] [prep] which they must | 22 |
|
| 3 | [noun] of [Wh det] they must | 5 |
|
| 4 | [noun] to [Wh det] they must | 5 |
|
