| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could n't [be] [vb pp] | 355 |
|
| 2 | could [be] [vb pp] [adj] | 239 |
|
| 3 | could n't [be] [adj] | 136 |
|
| 4 | n't [be] [vb pp] [adj] | 44 |
|
