| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb mod] be shown [that] | 141 |
|
| 2 | it [vb mod] be show that | 141 |
|
| 3 | it [vb mod] be show [that] | 141 |
|
| 4 | it can be show [that] | 108 |
|
| 5 | it must be show [that] | 13 |
|
| 6 | it could be show [that] | 13 |
|
