| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh adv] could we [vb infin] | 47 |
|
| 2 | how could we [vb infin] | 37 |
|
| 3 | where could we [vb infin] | 9 |
|
| 4 | [Wh adv] could we have | 5 |
|
