| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] [verb] [prep] a | 160 |
|
| 2 | [coord] could [not/n't] [verb] [prep] | 76 |
|
| 3 | [coord] [not/n't] [verb] [prep] a | 41 |
|
| 4 | [coord] could [not/n't] [verb] a | 38 |
|
| 5 | [coord] could [verb] [prep] a | 24 |
|
