| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what [pron] could [vb infin] | 443 |
|
| 2 | [prep] [pron] could [vb infin] | 416 |
|
| 3 | [prep] what [pron] could | 164 |
|
| 4 | [prep] what could [vb infin] | 60 |
|
