| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could we [vb infin] a | 37 |
|
| 2 | could we [verb] a | 37 |
|
| 3 | could we [verb] a | 35 |
|
| 4 | could we have a | 22 |
|
| 5 | could we have a | 22 |
|
