| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [vb infin] [noun] | 809 |
|
| 2 | [Wh det] could [adv] [vb infin] | 225 |
|
| 3 | [Wh det] could [vb infin] [noun] | 202 |
|
