| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] [prep] [Wh det] | 2762 |
|
| 2 | [prep] [Wh det] could | 313 |
|
| 3 | [vb pp] [Wh det] could | 59 |
|
| 4 | [vb pp] [prep] could | 5 |
|
