| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] at a [noun] | 4020 |
|
| 2 | could [verb] a [noun] | 2453 |
|
| 3 | could [verb] at [noun] | 87 |
|
| 4 | could [verb] at a | 27 |
|
