| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] be shown to [be] [verb] | 12 |
|
| 2 | [vb mod] be shown [prep] be [verb] | 12 |
|
| 3 | can be shown [prep] [be] [verb] | 10 |
|
| 4 | [vb mod] be shown [prep] [be] [vb pp] | 7 |
|
