| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [pron] must [vb infin] | 393 |
|
| 2 | [Wh det] one [modal v] [vb infin] | 290 |
|
| 3 | [pron] one must [vb infin] | 16 |
|
| 4 | [Wh det] one must [verb] | 14 |
|
