| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] could [noun prp] | 14 |
|
| 2 | what could [noun] | 13 |
|
| 3 | which could [noun] | 8 |
|
| 4 | [Wh det] could [noun sg] | 6 |
|
