| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] be shown to be | 90 |
|
| 2 | [vb mod] be shown to be | 90 |
|
| 3 | [vb mod] [be] shown to be | 90 |
|
| 4 | [vb mod] [be] shown to be | 90 |
|
| 5 | can [be] shown to be | 63 |
|
| 6 | could [be] shown to be | 15 |
|
| 7 | may [be] shown to be | 5 |
|
