| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could have [vb pp] [art] [noun] | 557 |
|
| 2 | have [vb pp] [art] [adj -er] [noun] | 168 |
|
| 3 | could have [vb pp] [art] [adj -er] | 21 |
|
| 4 | could have [art] [adj -er] [noun] | 14 |
|
| 5 | could have [vb pp] [adj -er] [noun] | 6 |
|
