| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [det] [modal v] not be | 100 |
|
| 2 | [adv] [det] could [adv] be | 16 |
|
| 3 | [adv] [adj] could not be | 8 |
|
| 4 | [adv] [det] could not be | 8 |
|
| 5 | [adv] [det] could not [be] | 7 |
|
