| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [Wh pn] could [vb infin] | 587 |
|
| 2 | [noun] could [vb infin] [noun prp] | 258 |
|
| 3 | [Wh pn] could [vb infin] [noun prp] | 27 |
|
