| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [vb infin] [verb] | 7453 |
|
| 2 | [vb infin] by [verb] | 733 |
|
| 3 | could [vb infin] by | 203 |
|
| 4 | could by [verb] | 6 |
|
