| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] we could [vb infin] | 529 |
|
| 2 | perhaps [pron] could [vb infin] | 376 |
|
| 3 | perhaps we [modal v] [vb infin] | 356 |
|
| 4 | perhaps we could [verb] | 92 |
|
