| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [pron] [pron] [modal v] | 1180 |
|
| 2 | [vb past] [pron] [pron] [vb mod] | 1180 |
|
| 3 | [verb] [pron] [pron] could | 843 |
|
| 4 | [vb past] [pron] [pron] could | 351 |
|
