| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] been show that [det] [noun pl] | 5 |
|
| 2 | [verb] been show that [det] [noun pl] | 5 |
|
| 3 | has been show that [det] [noun pl] | 5 |
|
| 4 | have been show that [det] [noun pl] | 5 |
|
