| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [vb infin] [pron] | 12148 |
|
| 2 | [verb] [vb infin] [pron] | 5122 |
|
| 3 | [verb] could [vb infin] | 339 |
|
| 4 | [verb] could [pron] | 70 |
|
