| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [modal v] [not/n't] [vb infin] | 3712 |
|
| 2 | [adv] could [adv] [vb infin] | 1021 |
|
| 3 | [adv] could [not/n't] [vb infin] | 961 |
|
| 4 | [adv] could [not/n't] [verb] | 956 |
|
