| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [vb infin] i [verb] [adv] | 20 |
|
| 2 | [modal v] [vb infin] i know [adv] | 10 |
|
| 3 | could [vb infin] [pron] know [adv] | 7 |
|
| 4 | could [verb] i know [adv] | 5 |
|
