| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] have [verb] a | 144 |
|
| 2 | [vb mod] n't have [verb] a | 128 |
|
| 3 | [modal v] n't have [verb] a | 128 |
|
| 4 | could not have [verb] a | 89 |
|
| 5 | could [not/n't] have [verb] a | 89 |
|
| 6 | could n't [vb infin] [verb] a | 82 |
|
| 7 | could n't [verb] [verb] a | 82 |
|
| 8 | could n't have [verb] [art] | 64 |
|
| 9 | could n't have [verb] a | 40 |
|
| 10 | could n't have [verb] a | 40 |
|
