| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [coord] [modal v] [not/n't] [vb infin] | 3115 |
|
| 2 | [coord] could [adv] [vb infin] | 1146 |
|
| 3 | [conj] could [not/n't] [vb infin] | 880 |
|
| 4 | [coord] could [not/n't] [verb] | 818 |
|
