| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | she could [not/n't] be [adj] | 41 |
|
| 2 | she could n't be [adj] | 22 |
|
| 3 | she could not be [adj] | 19 |
|
| 4 | she could [not/n't] be sure | 16 |
|
| 5 | she could [not/n't] be certain | 12 |
|
