| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] could [verb] [prep] [adj] | 70 |
|
| 2 | [conj] could [verb] [prep] [adj] | 70 |
|
| 3 | [conj] [modal v] [verb] at [adj] | 37 |
|
| 4 | [conj] could [verb] at [adj] | 7 |
|
