| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [adj] [conj] [pron] could | 88 |
|
| 2 | [verb] [det] [conj] [pron] could | 46 |
|
| 3 | [vb past] [det] [conj] [pron] [modal v] | 32 |
|
