| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could have [verb] [art] [noun] | 559 |
|
| 2 | have [verb] [art] [noun] [vb pp] | 72 |
|
| 3 | could [verb] [art] [noun] [vb pp] | 69 |
|
| 4 | could have [art] [noun] [vb pp] | 8 |
|
