| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [conj] [pron] could | 1344 |
|
| 2 | [verb] and [pron] could | 203 |
|
| 3 | [vb past] and [pron] [modal v] | 126 |
|
| 4 | [vb past] and [pron] [vb mod] | 126 |
|
| 5 | [vb past] and [pron] could | 30 |
|
