| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could not have [verb] [art] | 93 |
|
| 2 | not have [verb] [art] [adj -er] | 26 |
|
| 3 | could have [verb] [art] [adj -er] | 21 |
|
| 4 | could not [verb] [art] [adj -er] | 10 |
|
