| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun pl] could be [verb] | 3022 |
|
| 2 | could n't be [verb] | 377 |
|
| 3 | [noun pl] could n't [verb] | 201 |
|
| 4 | [noun pl] could n't be | 43 |
|
