| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it could [not/n't] [verb] a [adj] | 7 |
|
| 2 | it could [not/n't] [verb] a [adj] | 7 |
|
| 3 | it could [not/n't] [vb infin] a [adj] | 7 |
|
| 4 | it could not [verb] a [adj] | 6 |
|
