| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been shown in [det] | 10 |
|
| 2 | have be shown in [det] | 10 |
|
| 3 | have [been] shown in [det] | 10 |
|
| 4 | has [be] shown in [det] | 8 |
|
