| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] [be] [verb] | 2289 |
|
| 2 | [not/n't] [be] [verb] to | 1081 |
|
| 3 | could [be] [verb] to | 892 |
|
| 4 | could [not/n't] [verb] to | 356 |
|
