| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [subord] i could [adv] [vb infin] | 471 |
|
| 2 | [vb past] i could [adv] [vb infin] | 152 |
|
| 3 | [vb past] [subord] i could [vb infin] | 64 |
|
| 4 | [vb past] [subord] i could [adv] | 8 |
|
