| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] n't [be] [adj] | 2183 |
|
| 2 | could [adv] [be] [adj] | 643 |
|
| 3 | could not [be] [adj] | 325 |
|
| 4 | could [not/n't] [be] [adj] | 325 |
|
| 5 | could n't [be] [adj] | 231 |
|
