| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [pron] [pron] | 9320 |
|
| 2 | [vb past] [pron] could | 2700 |
|
| 3 | [pron] could [pron] | 590 |
|
| 4 | [vb past] could [pron] | 27 |
|
