| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | of [Wh det] must [vb infin] | 29 |
|
| 2 | of [Wh det] must have | 20 |
|
| 3 | of what must [vb infin] | 15 |
|
| 4 | of which must [vb infin] | 14 |
|
