| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | not [be] [vb pp] | 16352 |
|
| 2 | could [be] [vb pp] | 15275 |
|
| 3 | could not [be] | 3437 |
|
| 4 | could not [vb pp] | 5 |
|
