| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] could [not/n't] [vb infin] at [adj] | 5 |
|
| 2 | [coord] could [not/n't] [verb] at [adj] | 5 |
|
| 3 | [conj] could [not/n't] [verb] at [det] | 5 |
|
| 4 | [conj] could [not/n't] [verb] at [adj] | 5 |
|
