| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] not [be] [vb pp] and | 252 |
|
| 2 | [modal v] not [be] [vb pp] and | 252 |
|
| 3 | could not [be] [vb pp] [conj] | 227 |
|
| 4 | could [adv] [be] [vb pp] and | 74 |
|
| 5 | could not [be] [vb pp] and | 42 |
|
| 6 | could not [be] [verb] and | 42 |
|
