| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] must [verb] | 459 |
|
| 2 | [Wh det] must [vb infin] | 458 |
|
| 3 | [pron] must rank | 12 |
|
| 4 | [Wh det] [modal v] rank | 8 |
|
| 5 | [Wh det] must rank | 6 |
|
