| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could not [verb] [verb] | 2606 |
|
| 2 | could not be [verb] | 2289 |
|
| 3 | not be [verb] [verb] | 1761 |
|
| 4 | could be [verb] [verb] | 1346 |
|
