| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [pron] could [vb infin] | 1462 |
|
| 2 | we [vb past] [pron] could | 65 |
|
| 3 | we [vb past] [pron] [vb infin] | 57 |
|
| 4 | we [pron] could [vb infin] | 6 |
|
