| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could not have [vb pp] for a | 11 |
|
| 2 | could not have [verb] for a | 11 |
|
| 3 | could not have [verb] for a | 6 |
|
| 4 | could not have ask for a | 5 |
|
| 5 | could not have asked for a | 5 |
|
| 6 | could n't have [verb] for a | 5 |
|
