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