| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [pron] could [not/n't] [vb infin] | 4360 |
|
| 2 | [conj] we [modal v] [not/n't] [vb infin] | 1802 |
|
| 3 | [conj] we could [adv] [vb infin] | 444 |
|
| 4 | [conj] we could [not/n't] [verb] | 255 |
|
