| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [Wh det] must [vb infin] | 24 |
|
| 2 | [verb] what must [vb infin] | 21 |
|
| 3 | [verb] [Wh det] must have | 21 |
|
| 4 | [vb pp] [Wh det] must [vb infin] | 7 |
|
| 5 | [vb past] [Wh det] must [vb infin] | 6 |
|
