| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [verb] i could [vb infin] | 9 |
|
| 2 | [vb past] [verb] i could [vb infin] | 9 |
|
| 3 | [vb past] [vb pp] i could [vb infin] | 6 |
|
