| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | research have shown that [adj] [noun] | 18 |
|
| 2 | research has shown that [adj] [noun] | 16 |
|
| 3 | research [vb -s] shown that [adj] [noun] | 16 |
|
| 4 | research [verb] shown that [adj] [noun] | 8 |
|
| 5 | research [verb] shown that [adj] [noun pl] | 8 |
|
| 6 | research [verb] shown that [det] [noun] | 7 |
|
| 7 | research [verb] shown that [adj] [noun sg] | 5 |
|
