| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] [pron] could | 440 |
|
| 2 | [vb pp] which [modal v] | 287 |
|
| 3 | [vb pp] which [vb mod] | 287 |
|
| 4 | [verb] which could | 78 |
|
| 5 | [vb pp] which could | 44 |
|
