| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] you must [vb infin] | 72 |
|
| 2 | [prep] [Wh det] must [vb infin] | 68 |
|
| 3 | [prep] [Wh det] you must | 18 |
|
| 4 | [prep] you must [vb infin] | 16 |
|
