| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [pron] [vb mod] [pron] | 55 |
|
| 2 | [vb past] [pron] [modal v] [pron] | 55 |
|
| 3 | [verb] [pron] could [pron] | 47 |
|
| 4 | [vb past] [pron] could [pron] | 5 |
|
