| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [pron] could | 2700 |
|
| 2 | [adj] [pron] could | 2452 |
|
| 3 | [vb past] [adj] [pron] | 2372 |
|
| 4 | [vb past] [adj] could | 45 |
|
