| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | we could [not/n't] [vb infin] a [adj] | 13 |
|
| 2 | we could [not/n't] [verb] a [adj] | 13 |
|
| 3 | we could n't [verb] a [adj] | 8 |
|
| 4 | we could not [verb] a [adj] | 5 |
|
