| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could not be [verb] | 1911 |
|
| 2 | [conj] could be [verb] | 1062 |
|
| 3 | [conj] could not [verb] | 472 |
|
| 4 | [conj] could not be | 210 |
|
| 5 | [conj] not be [verb] | 107 |
|
