| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which have be shown to | 16 |
|
| 2 | which [verb] been shown to | 16 |
|
| 3 | which [verb] be shown to | 16 |
|
| 4 | which [vb -s] be shown to | 8 |
|
| 5 | which has be shown to | 8 |
|
| 6 | which have be shown to | 6 |
|
| 7 | which [vb base] be shown to | 6 |
|
