| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] [verb] a [adj] | 249 |
|
| 2 | [conj] could [not/n't] [verb] [adj] | 63 |
|
| 3 | [conj] could [verb] a [adj] | 60 |
|
| 4 | [conj] [not/n't] [verb] a [adj] | 52 |
|
| 5 | [conj] could [not/n't] [verb] a | 41 |
|
