| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [not/n't] be [vb pp] | 16354 |
|
| 2 | could be [vb pp] | 15275 |
|
| 3 | could [not/n't] be | 3437 |
|
| 4 | could [not/n't] [vb pp] | 5 |
|
