| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [modal v] i [vb infin] | 878 |
|
| 2 | [Wh det] could [pron] [vb infin] | 248 |
|
| 3 | [pron] could i [vb infin] | 75 |
|
| 4 | [Wh det] could i [verb] | 55 |
|
