| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] [verb] a [adj] | 249 |
|
| 2 | [Wh pn] could [not/n't] [verb] a | 28 |
|
| 3 | [Wh pn] could [not/n't] [verb] [adj] | 27 |
|
| 4 | [Wh pn] could [verb] a [adj] | 24 |
|
