| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh pn] [modal v] [vb infin] | 9111 |
|
| 2 | [n mass] [modal v] [vb infin] | 5580 |
|
| 3 | [n mass] [Wh pn] [modal v] | 1018 |
|
