| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] could [not/n't] [vb infin] a [adj] | 10 |
|
| 2 | [adv] could [not/n't] [verb] a [adj] | 9 |
|
| 3 | [adv] could n't [verb] a [adj] | 5 |
|
| 4 | [adv] could not [verb] a [adj] | 5 |
|
