| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [vb pp] [det] [pron] [modal v] | 17 |
|
| 2 | [vb past] [verb] [det] [pron] could | 11 |
|
| 3 | [verb] [vb pp] [det] [pron] could | 9 |
|
| 4 | [vb past] [vb pp] [adj] [pron] could | 8 |
|
