| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could n't have [be] | 185 |
|
| 2 | could n't possibly have | 37 |
|
| 3 | could n't possibly [be] | 25 |
|
| 4 | could possibly have [be] | 14 |
|
| 5 | n't possibly have [be] | 10 |
|
