| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] must [verb] | 459 |
|
| 2 | [Wh det] must [vb infin] | 458 |
|
| 3 | [Wh det] [modal v] exist | 40 |
|
| 4 | [pron] must exist | 22 |
|
| 5 | [Wh det] must exist | 5 |
|
