| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [modal v] [pron] | 3820 |
|
| 2 | [vb past] [Wh det] [pron] | 2453 |
|
| 3 | [vb past] [Wh det] [modal v] | 215 |
|
| 4 | [vb past] [modal v] [pron] | 176 |
|
