| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been shown to be [adv] | 45 |
|
| 2 | have been shown to be [adv] | 45 |
|
| 3 | have been shown to [be] [adv] | 45 |
|
| 4 | have been shown to [be] [adv] | 45 |
|
| 5 | have been shown to [adv] [verb] | 7 |
|
| 6 | have been shown to [adv] [vb infin] | 7 |
|
