| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [verb] [pron] could [vb infin] | 83 |
|
| 2 | [vb past] [verb] i [modal v] [vb infin] | 58 |
|
| 3 | [verb] [verb] i could [vb infin] | 18 |
|
| 4 | [vb past] [verb] i could [verb] | 9 |
|
