| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [noun pl] could [verb] [prep] a | 10 |
|
| 2 | [conj] [noun pl] could [vb infin] [prep] a | 10 |
|
| 3 | [coord] [noun pl] could [verb] [prep] a | 5 |
|
