| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] i [vb mod] | 2795 |
|
| 2 | [vb past] i [modal v] | 2795 |
|
| 3 | [vb past] [pron] could | 2700 |
|
| 4 | [verb] i could | 1483 |
|
| 5 | [vb past] i could | 536 |
|
