| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could have [vb pp] [art] [adj -er] | 21 |
|
| 2 | could have [vb pp] [art] [adj -er] | 21 |
|
| 3 | could have [vb pp] a [adj -er] | 18 |
|
| 4 | could have [vb pp] a [adj -er] | 18 |
|
| 5 | could have [vb pp] [art] better | 10 |
|
| 6 | could have had [art] [adj -er] | 5 |
|
