| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could not have [verb] | 548 |
|
| 2 | could not have [vb pp] | 548 |
|
| 3 | could [adv] have said | 48 |
|
| 4 | [modal v] not have said | 45 |
|
| 5 | could [not/n't] have said | 41 |
|
| 6 | could not have said | 41 |
|
| 7 | could not [verb] said | 22 |
|
| 8 | could not have say | 21 |
|
