| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] must [verb] | 20007 |
|
| 2 | [Wh det] [modal v] [verb] | 18418 |
|
| 3 | [Wh det] [vb mod] [verb] | 18418 |
|
| 4 | [Wh det] must [verb] | 459 |
|
