| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] [be] [vb pp] | 2250 |
|
| 2 | it could [be] [vb pp] | 1259 |
|
| 3 | it could [not/n't] [be] | 371 |
|
| 4 | it [not/n't] [be] [vb pp] | 19 |
|
