| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh adv] [modal v] i [vb infin] | 1241 |
|
| 2 | [Wh adv] could [pron] [vb infin] | 935 |
|
| 3 | [adv] could i [vb infin] | 215 |
|
| 4 | [Wh adv] could i [verb] | 170 |
|
