| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [coord] [vb past] [pron] could | 142 |
|
| 2 | [coord] [vb past] [Wh det] [vb mod] | 20 |
|
| 3 | [coord] [vb past] [Wh det] [modal v] | 20 |
|
| 4 | [coord] [verb] [Wh det] could | 15 |
|
| 5 | [conj] [vb past] [Wh det] could | 8 |
|
| 6 | [coord] [vb past] [Wh det] could | 6 |
|
