| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [modal v] [verb] | 18418 |
|
| 2 | [modal v] [verb] at | 5235 |
|
| 3 | [Wh det] [verb] at | 1119 |
|
| 4 | [Wh det] [modal v] at | 53 |
|
