| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [Wh det] [modal v] [vb infin] | 1100 |
|
| 2 | [prep] [Wh det] [vb mod] [vb infin] | 1100 |
|
| 3 | [prep] [pron] must [vb infin] | 196 |
|
| 4 | [prep] [Wh det] must [verb] | 68 |
|
| 5 | [prep] [Wh det] must [vb infin] | 68 |
|
| 6 | [prep] [Wh det] must [vb infin] | 68 |
|
