| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been shown to [be] | 176 |
|
| 2 | have be shown to be | 176 |
|
| 3 | has be shown to [be] | 100 |
|
| 4 | have be shown to [be] | 62 |
|
| 5 | had be shown to [be] | 13 |
|
