| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [not/n't] be [verb] | 17405 |
|
| 2 | could [adv] be [verb] | 4878 |
|
| 3 | could [not/n't] [be] [verb] | 2289 |
|
| 4 | could [not/n't] be [verb] | 2289 |
|
| 5 | could [not/n't] [be] [verb] | 2288 |
|
