| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [pron] could | 2700 |
|
| 2 | [vb past] he [pron] | 1415 |
|
| 3 | [vb past] he could | 684 |
|
| 4 | he [pron] could | 121 |
|
