| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] [pron] [vb infin] | 333 |
|
| 2 | [modal v] [not/n't] i [vb infin] | 243 |
|
| 3 | [vb mod] [not/n't] i [vb infin] | 243 |
|
| 4 | could [not/n't] i [verb] | 27 |
|
| 5 | could [adv] i [vb infin] | 26 |
|
| 6 | could [not/n't] i [vb infin] | 26 |
|
