| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could n't [verb] | 12359 |
|
| 2 | could [verb] [be] | 3102 |
|
| 3 | n't [verb] [be] | 1336 |
|
| 4 | could n't [be] | 923 |
|
