| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [modal v] [not/n't] [vb infin] | 3782 |
|
| 2 | [adv] could [adv] [vb infin] | 1035 |
|
| 3 | [adv] could [not/n't] [verb] | 963 |
|
