| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] [vb infin] | 21338 |
|
| 2 | and could [vb infin] | 933 |
|
| 3 | and could [not/n't] | 687 |
|
| 4 | and [not/n't] [vb infin] | 78 |
|
