| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could have [vb pp] the [noun] [verb] | 29 |
|
| 2 | could have [verb] the [noun sg] [verb] | 25 |
|
| 3 | could have [verb] the [noun] [to-vb] | 15 |
|
| 4 | could have [verb] the [noun] [vb pp] | 5 |
|
