| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] be [vb pp] at any stage | 6 |
|
| 2 | [modal v] be [vb pp] at any stage | 6 |
|
| 3 | can be [vb pp] at any stage | 5 |
|
| 4 | can be [vb pp] at any stage | 5 |
|
| 5 | be [vb pp] at any stage [prep] | 6 |
|
| 6 | be [vb pp] at any stage [prep] | 6 |
|
