| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could have [vb pp] a [noun] | 146 |
|
| 2 | [noun prp] could have [vb pp] a | 22 |
|
| 3 | [noun prp] could have [vb pp] [noun] | 21 |
|
| 4 | [noun prp] could have a [noun] | 11 |
|
