| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] [verb] a [noun sg] | 560 |
|
| 2 | [not/n't] [verb] a [adj -er] [noun sg] | 118 |
|
| 3 | could [verb] a [adj -er] [noun sg] | 85 |
|
| 4 | could [not/n't] [verb] a [adj -er] | 20 |
|
