| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] has [adv] been shown to | 19 |
|
| 2 | [noun sg] has [adv] been shown to | 17 |
|
| 3 | has [adv] been shown to be | 25 |
|
| 4 | has [adv] been shown to [be] | 25 |
|
| 5 | has [adv] been shown to be | 25 |
|
| 6 | has [adv] been shown to [be] | 25 |
|
