| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [det] [modal v] not be | 404 |
|
| 2 | [conj] [det] could [adv] be | 89 |
|
| 3 | [conj] [adj] could not be | 38 |
|
| 4 | [conj] [det] could not [be] | 35 |
|
