| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] could [verb] a | 2364 |
|
| 2 | [vb past] [pers pn] [verb] a | 2149 |
|
| 3 | [vb past] [pers pn] could [verb] | 1430 |
|
