| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [conj] [pers pn] | 25886 |
|
| 2 | [conj] [pers pn] could | 24132 |
|
| 3 | [vb past] [pers pn] could | 2608 |
|
| 4 | [vb past] [conj] could | 68 |
|
