| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | studies have shown that [adj] [noun] | 31 |
|
| 2 | studies [vb base] shown that [adj] [noun] | 30 |
|
| 3 | studies have shown that [adj] [noun] | 30 |
|
| 4 | studies [verb] shown that [adj] [noun] | 27 |
|
| 5 | studies [verb] shown that [adj] [noun sg] | 18 |
|
| 6 | studies [verb] shown that [adj] [noun pl] | 12 |
|
