| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] have [vb pp] [art] [adj] | 103 |
|
| 2 | [modal v] [adv] have [vb pp] [art] [adj -er] | 58 |
|
| 3 | [vb mod] [adv] have [vb pp] [art] [adj -er] | 58 |
|
| 4 | could [adv] have [vb pp] [art] [adj -er] | 49 |
|
| 5 | could [adv] have [verb] [art] [adj -er] | 49 |
|
| 6 | could [adv] [verb] [vb pp] [art] [adj -er] | 49 |
|
| 7 | could [adv] have [vb pp] [art] [adj -er] | 49 |
|
| 8 | could [adv] have [vb pp] [art] [adj -er] | 49 |
|
| 9 | could [adv] [vb infin] [vb pp] [art] [adj -er] | 49 |
|
