| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | for [Wh det] must [vb infin] | 6 |
|
| 2 | for [Wh det] must have | 6 |
|
| 3 | for what must [verb] | 6 |
|
| 4 | for [Wh det] must have | 6 |
|
