| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | studies have [vb pp] that the | 54 |
|
| 2 | studies have [verb] that the | 54 |
|
| 3 | studies have [verb] that the | 54 |
|
| 4 | studies have show that the | 38 |
|
| 5 | studies have shown that the | 38 |
|
