| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could [vb infin] [verb] [pron] at | 5 |
|
| 2 | could [vb infin] [verb] [pron] [noun sg] at | 6 |
|
| 3 | could [vb infin] [verb] [pron] [noun] at | 6 |
|
