| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [Wh det] they [verb] | 4081 |
|
| 2 | [prep] [Wh det] must [verb] | 68 |
|
| 3 | [Wh det] they must [verb] | 51 |
|
| 4 | [prep] [Wh det] they must | 37 |
|
