| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [pron] [verb] | 67338 |
|
| 2 | [pron] could [verb] | 45395 |
|
| 3 | [Wh det] [pron] could | 1915 |
|
| 4 | [Wh det] could [verb] | 1704 |
|
