| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [vb past] could [vb infin] [pron] | 13 |
|
| 2 | [pron] [vb past] could [verb] [pron] | 13 |
|
| 3 | [pron] [vb past] could [pron] [vb infin] | 11 |
|
| 4 | [pron] [vb past] could [pron] [verb] | 11 |
|
