| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] [be] [vb pp] | 2250 |
|
| 2 | could [not/n't] [be] [adj] | 325 |
|
| 3 | [not/n't] [be] [vb pp] [adj] | 256 |
|
| 4 | could [be] [vb pp] [adj] | 239 |
|
